Updated on 2025/06/13

写真a

 
NISHINA Yuta
 
Organization
Scheduled update Professor
Position
Professor
Homepage
http://kaken.nii.ac.jp/d/r/50585940.ja.html
Profile

略歴
1984年5月 岡山県生まれ

学歴

2003年3月 岡山県立倉敷青陵高校 卒業
2003年4月 岡山大学工学部物質応用化学科 入学
2007年3月 岡山大学大学院自然科学研究科博士前期課程 修了
2010年3月 岡山大学大学院自然科学研究科博士後期課程 修了（工学博士）

職歴
平成20年4月－平成22年3月 日本学術振興会特別研究員（DC2）
平成22年4月－平成26年3月 岡山大学異分野融合先端研究コア 助教（特任）
平成23年1月－平成23年2月 フロリダ州立大学化学科 客員研究員（兼任）
平成23年12月－平成24年1月 南洋理工大学化学生物学科 客員教授（兼任）
平成25年10月－平成29年3月 JSTさきがけ 研究員（兼任）
平成26年4月－平成30年9月 岡山大学異分野融合先端研究コア 准教授
平成29年4月－平成31年3月 大阪大学産業科学研究所 招聘准教授（兼任）
平成30年10月－令和6年3月 岡山大学異分野融合先端研究コア 研究教授
平成31年4月－令和2年3月 大阪大学産業科学研究所 招聘教授（兼任）

令和4年7月－ University of New England Adjunct Professor（兼任）

令和6年4月－ 岡山大学 異分野基礎科学研究所 教授

External link

Degree

  • PhD ( Okayama University )

Research Interests

  • Materials chemistry

  • Organic chemistry

  • Catalysis

  • Carbon

Research Areas

  • Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Catalyst and resource chemical process

  • Nanotechnology/Materials / Functional solid state chemistry

  • Life Science / Bioorganic chemistry

  • Nanotechnology/Materials / Structural organic chemistry and physical organic chemistry

  • Nanotechnology/Materials / Organic functional materials

Education

  • 岡山大学大学院 自然科学研究科 博士後期課程    

    2007.4 - 2010.3

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  • 岡山大学大学院 自然科学研究科 博士前期課程    

    2006.4 - 2007.3

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  • 岡山大学 工学部    

    2003.4 - 2006.3

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Research History

  • 岡山大学 異分野基礎科学研究所 教授

    2024.4

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  • 岡山大学 異分野融合先端研究コア 研究教授

    2018.10 - 2024.3

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  • 岡山大学 異分野融合先端研究コア 准教授

    2014.3 - 2018.10

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  • Okayama University   Assistant Professor

    2010.4 - 2014.3

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Professional Memberships

Committee Memberships

  •   Carbon Reports誌 副編集委員長  

    2023.4   

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    Committee type：Academic society

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  • 炭素材料学会   「炭素」 編集委員  

    2020.4   

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  • 高分子学会   「高分子」 編集委員  

    2020.4 - 2022.5   

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Papers

  • Tunable interlayer distance in graphene oxide through alkylamine surface coverage and chain length Reviewed

    Israel Ortiz-Anaya, Seiji Obata, Yuta Nishina

    Journal of Colloid and Interface Science   695   137727 - 137727   2025.10

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    Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.jcis.2025.137727

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  • Grafting-through functionalization of graphene oxide with cationic polymers for enhanced adsorption of anionic dyes and viruses

    Ryota Kimura, Pilar Ferré-Pujol, Yuta Nishina

    Carbon   238   2025.5

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.carbon.2025.120296

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  • Reversible chemical modifications of graphene oxide for enhanced viral capture and release in water

    Pilar Ferré-Pujol, Seiji Obata, Jésus Raya, Alberto Bianco, Hiroyuki Katayama, Takashi Kato, Yuta Nishina

    Carbon   234   2025.3

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.carbon.2025.120015

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  • Graphene Oxide as a Self‐Carbocatalyst to Facilitate the Ring‐Opening Polymerization of Glycidol for Efficient Polyglycerol Grafting

    Yajuan Zou, Kentaro Ohkura, Israel Ortiz‐Anaya, Ryota Kimura, Alberto Bianco, Yuta Nishina

    Chemistry – A European Journal   2025.1

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    Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    Abstract

    Grafting carbon‐based nanomaterials (CNMs) with polyglycerol (PG) improves their application potentials in biomedicine and electronics. Although “grafting from” method offers advantages over “grafting to” one in terms of operability and versatility, little is known about the reaction process of glycidol with the surface groups onto CNMs. By using graphene oxide (GO) as a multi‐functional model material, we examined the reactivity of the surface groups on GO toward glycidol molecules via a set of model reactions. We reveal that carboxyl groups spontaneously react with the epoxide ring with no need of catalyst, while GO catalyzes the reactions of hydroxyl groups with the epoxide of glycidol. In addition, the hydroxyl group of glycidol can open the epoxide in the basal plane of GO. The subsequent polymerization of PG is supposed to propagate at the primary and/or the secondary hydroxyl groups, generating a ramified PG macromolecule with random branch‐on‐branch topology. In addition, ketones, benzyl esters and aromatic ethers are found not to react with glycidol even in the presence of GO, while the aldehydes are easily oxidized into carboxyl groups under ambient condition, behaving then as the carboxyl groups. Our findings pose the foundation for understanding the polymerization mechanism of PG on CNMs.

    DOI： 10.1002/chem.202404400

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  • Electrochemical exfoliation of graphite using aqueous ammonium hydrogen carbonate solution and the ability of the exfoliated product as a hydrogen production electrocatalyst support International journal

    Ryuichi Maekawa, Hirooki Kajiwara, Yuto Washiyama, Yasushi Nishikawa, Naoto Kuwamura, Toshinori Okura, Yuta Nishina, Hideki Hashimoto

    Heliyon   10 ( 23 )   e40751 - e40751   2024.12

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    Electrochemical exfoliation of graphite has attracted much attention as a practical mass production of two-dimensional graphene-like materials. There is an increasing desire to find new and improved methods to create unique exfoliated products with excellent functionality. We used aqueous ammonium hydrogen carbonate solution as a new electrolyte for anodic oxidative exfoliation of graphite. The exfoliated product has a porous two-dimensional structure, and it can be dispersed in water for over five years. The oxidized and defected porous surface serves as an ideal support for molecular metal complexes, effectively functioning as heterogeneous electrocatalysts for hydrogen production.

    DOI： 10.1016/j.heliyon.2024.e40751

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  • Control of the electronic and optical properties of aminoxyl radicals via boron complexation. International journal

    Takuma Kuroda, Peiyuan Yang, Marika Nakamura, Risa Hyakutake, Hiroki Fukumoto, Toshiyuki Oshiki, Yuta Nishina, Koichiro Masada, Takahiro Sasamori, Yosihiyuki Mizuhata, Kazuya Kubo, Ryo Inoue, Tomohiro Agou

    Dalton transactions (Cambridge, England : 2003)   2024.11

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    Language：English   Publishing type：Research paper (scientific journal)  

    Stable radicals have attracted increasing attention in recent years because of their unique electronic and optical characteristics. Aminoxyl radicals are one of the most widely studied stable radicals to date, but their applications in opto-functional materials have yet to be explored in detail. Our group previously reported the boron complexes of aminoxyl radicals exhibit near-infrared (NIR) absorption. In this work, an aminoxyl radical without boron-complexation was synthesized to elucidate the effects of boron coordination on the properties of the aminoxyl radicals. The results of electron spin resonance spectroscopy, ultraviolet-visible-NIR absorption measurements, and density functional theory calculations indicated that boron complexation facilitated spin delocalization over the radical π-frameworks. Furthermore, a π-extended aminoxyl radical-boron complex exhibited a significant wavelength-shift to longer wavelengths in the NIR-II absorption region, thereby reflecting its larger π-conjugated radical skeleton.

    DOI： 10.1039/d4dt02973a

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  • Mass Production of Graphene Oxide Beyond the Laboratory: Bridging the Gap Between Academic Research and Industry International journal

    Yuta Nishina

    ACS Nano   18 ( 49 )   33264 - 33275   2024.11

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

    The mass production of graphene oxide (GO) has garnered significant attention in recent years due to its potential applications in various fields, from materials science to biomedicine. Graphene, known for its unique properties, such as high conductivity and mechanical strength, has been extensively studied. However, traditional production methods such as the exfoliation of graphite with scotch tape are not suitable for large-scale production. This has led to an increased focus on GO as a viable alternative to graphene production. Nonetheless, challenges, including the optimization of oxidation processes, the control of structural uniformity, and the reproducibility of production, have not been solved so far. This review critically examines GO production advancements by analyzing experimental and mechanistic studies to identify significant developments that enable high-yield and reproducible methods suitable for industrial-scale production. Special attention is given to oxidation techniques and postsynthesis purification and storage, with a focus on controlled oxidation to achieve homogeneous and single-layer GO. Through this lens, the review outlines the path forward for the industrialization of GO, aiming to bridge the gap between academic research and industrial production.

    DOI： 10.1021/acsnano.4c13297

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  • Biocompatibility of Water-Dispersible Pristine Graphene and Graphene Oxide Using a Close-to-Human Animal Model: A Pilot Study on Swine. International journal

    Paola Nicolussi, Giovannantonio Pilo, Maria Giovanna Cancedda, Guotao Peng, Ngoc Do Quyen Chau, Alejandro De la Cadena, Renzo Vanna, Yarjan Abdul Samad, Tanweer Ahmed, Jeremia Marcellino, Giuseppe Tedde, Linda Giro, Acelya Ylmazer, Federica Loi, Gavina Carta, Loredana Secchi, Silvia Dei Giudici, Simona Macciocu, Dario Polli, Yuta Nishina, Ciriaco Ligios, Giulio Cerullo, Andrea Ferrari, Alberto Bianco, Bengt Fadeel, Giulia Franzoni, Lucia Gemma Delogu

    Advanced healthcare materials   e2401783   2024.10

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    Language：English   Publishing type：Research paper (scientific journal)  

    Graphene-based materials (GBMs) are of considerable interest for biomedical applications, and the pilot study on the toxicological and immunological impact of pristine graphene (GR) and graphene oxide (GO) using swine as a close-to-human provides valuable insights. First, ex vivo experiments are conducted on swine blood cells, then GBMs are injected intraperitoneally (i.p.) into swine. Hematological and biochemical analyses at various intervals indicate that neither GO nor GR cause systemic inflammation, pro-coagulant responses, or renal or hepatic dysfunction. Importantly, no systemic toxicity is observed. Analysis of a panel of 84 immune-related genes shows minimal impact of GO and GR. The animals are sacrificed 21 days post-injection, and transient absorption imaging and Raman mapping show the presence of GO and GR in the mesentery only. Histological evaluation reveals no signs of alterations in other organs. Thus, clusters of both materials are detected in the mesentery, and GO aggregates are surrounded only by macrophages with the formation of granulomas. In contrast, modest local reactions are observed around the GR clusters. Overall, these results reveal that i.p. injection of GBMs resulted in a modest local tissue reaction without systemic toxicity. This study, performed in swine, provides essential guidance for future biomedical applications of graphene.

    DOI： 10.1002/adhm.202401783

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  • Gasification Behavior of Plant-Based Biomass and Its Application to the Manufacturing Process of Titanium Sulfides under Sulfur Partial Pressure

    Ichiro Seki, Yuki Matsuoka, Chinami Matsuda, Noa Watanabe, Chiyu Nakano, Yuta Nishina

    Materials Transactions   65 ( 10 )   1310 - 1319   2024.10

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    DOI： 10.2320/matertrans.MT-M2023220

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  • Investigating the radical properties of oxidized carbon materials under photo-irradiation: behavior of carbon radicals and their application in catalytic reactions. International journal

    Md Razu Ahmed, Israel Ortiz Anaya, Yuta Nishina

    Chemical communications (Cambridge, England)   60 ( 76 )   10544 - 10547   2024.9

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    Language：English   Publishing type：Research paper (scientific journal)  

    Oxidized carbon materials have abundant surface functional groups and customizable properties, making them an excellent platform for generating radicals. Unlike reactive oxygen species such as hydroxide or superoxide radicals that have been reported previously, oxidized carbon also produces stable carbon radicals under photo-irradiation. This has been confirmed through electron spin resonance. Among the various oxidized carbon materials synthesized, graphene oxide shows the largest number of carbon radicals when exposed to blue LED light. The light absorption capacity, high surface area, and unique structural characteristics of oxidized carbon materials offer a unique function for radical-mediated oxidative reactions.

    DOI： 10.1039/d4cc03101f

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  • State change of Na clusters in hard carbon electrodes and increased capacity for Na-ion batteries achieved by heteroatom doping

    Hideka Ando, Kenjiro Hashi, Shinobu Ohki, Yoshikiyo Hatakeyama, Yuta Nishina, Norihiro Kowata, Takahiro Ohkubo, Kazuma Gotoh

    Carbon Trends   16   100387 - 100387   2024.9

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    Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.cartre.2024.100387

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  • Light-Responsive and Antibacterial Graphenic Materials as a Holistic Approach to Tissue Engineering. International journal

    Andrea Ferreras, Ana Matesanz, Jabier Mendizabal, Koldo Artola, Yuta Nishina, Pablo Acedo, José L Jorcano, Amalia Ruiz, Giacomo Reina, Cristina Martín

    ACS nanoscience Au   4 ( 4 )   263 - 272   2024.8

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    Language：English   Publishing type：Research paper (scientific journal)  

    While the continuous development of advanced bioprinting technologies is under fervent study, enhancing the regenerative potential of hydrogel-based constructs using external stimuli for wound dressing has yet to be tackled. Fibroblasts play a significant role in wound healing and tissue implants at different stages, including extracellular matrix production, collagen synthesis, and wound and tissue remodeling. This study explores the synergistic interplay between photothermal activity and nanomaterial-mediated cell proliferation. The use of different graphene-based materials (GBM) in the development of photoactive bioinks is investigated. In particular, we report the creation of a skin-inspired dressing for wound healing and regenerative medicine. Three distinct GBM, namely, graphene oxide (GO), reduced graphene oxide (rGO), and graphene platelets (GP), were rigorously characterized, and their photothermal capabilities were elucidated. Our investigations revealed that rGO exhibited the highest photothermal efficiency and antibacterial properties when irradiated, even at a concentration as low as 0.05 mg/mL, without compromising human fibroblast viability. Alginate-based bioinks alongside human fibroblasts were employed for the bioprinting with rGO. The scaffold did not affect the survival of fibroblasts for 3 days after bioprinting, as cell viability was not affected. Remarkably, the inclusion of rGO did not compromise the printability of the hydrogel, ensuring the successful fabrication of complex constructs. Furthermore, the presence of rGO in the final scaffold continued to provide the benefits of photothermal antimicrobial therapy without detrimentally affecting fibroblast growth. This outcome underscores the potential of rGO-enhanced hydrogels in tissue engineering and regenerative medicine applications. Our findings hold promise for developing game-changer strategies in 4D bioprinting to create smart and functional tissue constructs with high fibroblast proliferation and promising therapeutic capabilities in drug delivery and bactericidal skin-inspired dressings.

    DOI： 10.1021/acsnanoscienceau.4c00006

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  • Engineering Zeolitic-Imidazolate-Framework-Derived Mo-Doped Cobalt Phosphide for Efficient OER Catalysts International journal

    Mohammad Atiqur Rahman, Ze Cai, Zannatul Mumtarin Moushumy, Ryuta Tagawa, Yoshiharu Hidaka, Chiyu Nakano, Md. Saidul Islam, Yoshihiro Sekine, Yuta Nishina, Shintaro Ida, Shinya Hayami

    ACS Omega   9 ( 34 )   36114 - 36121   2024.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

    Designing a cheap, competent, and durable catalyst for the oxygen evolution reaction (OER) is exceedingly necessary for generating oxygen through a water-splitting reaction. In this project, we have designed a ZIF-67-originated molybdenum-doped cobalt phosphide (CoP) using a simplistic dissolution-regrowth method using Na2MoO4 and a subsequent phosphidation process. This leads to the formation of an exceptional hollow nanocage morphology that is useful for enhanced catalytic activity. Metal-organic frameworks, especially ZIF-67, can be used both as a template and as a metal (cobalt) precursor. Molybdenum-doped CoP was fabricated through a two-step synthesis process, and the fabricated Mo-doped CoP showed excellent catalytic activity during the OER with a lower value of overpotential. Furthermore, the effect of the Mo amount on the catalytic activity has been explored. The best catalyst (CoMoP-2) showed an onset potential of around 1.49 V at 10 mA cm-2 to give rise to a Tafel slope of 62.1 mV dec-1. The improved catalytic activity can be attributed to the increased porosity and surface area of the resultant catalyst.

    DOI： 10.1021/acsomega.4c00403

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  • Size‐Dependent Magnetic Responsiveness of a Photonic Crystal of Graphene Oxide Nanosheets International journal

    Daisuke Ogawa, Yuta Nishina, Koki Sano

    ChemPlusChem   89 ( 12 )   e202400449   2024.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    A magnetically responsive photonic crystal of colloidal nanosheets can exhibit a controllable structural color, offering diverse potential applications. In this study, we systematically investigated how the lateral sizes of graphene oxide (GO) nanosheets affect their magnetic responsiveness in a photonic system. Contrary to the prediction that larger lateral sizes of nanosheets would be more responsive to an applied magnetic field based on the magnetic energy of anisotropic materials, we discovered that GO nanosheets with larger lateral sizes in the photonic system scarcely responded to a 12 T magnetic field. The lack of magnetic response may be due to the strongly restricted rotational motion of GO nanosheets by mutual electrostatic forces. In contrast, GO nanosheets with medium lateral sizes readily responded to the 12 T magnetic field, forming a uniaxially oriented structure that resulted in a vivid structural color. However, smaller GO nanosheets displayed a less vivid structural color, possibly because of less structural ordering of GO nanosheets. Finally, we found that the photonic crystal of GO nanosheets with optimized lateral sizes responded effectively to the 12 T magnetic field across various GO concentrations, resulting in a vivid and tunable structural color.

    DOI： 10.1002/cplu.202400449

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  • Ordered Carbonaceous Framework Synthesized from Hexaazatrinaphthylene with Enediyne Groups via Solid-State Bergman Cyclization Reaction International journal

    Yuki Sano, Ryojun Toyoda, Koki Chida, Takeharu Yoshii, Hirotomo Nishihara, Yuta Nishina, Daisuke Asanoma, Shinya Takaishi, Kunihisa Sugimoto, Ryota Sakamoto

    ACS Applied Materials & Interfaces   16 ( 32 )   42615 - 42622   2024.8

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

    Porous materials synthesized through bottom-up approaches, such as metal-organic frameworks and covalent organic frameworks, have attracted attention owing to their design flexibility for functional materials. However, achieving the chemical and thermal stability of these materials for various applications is challenging considering the reversible coordination bonds and irreversible covalent bonds in their frameworks. Thus, ordered carbonaceous frameworks (OCFs) emerge as a promising class of bottom-up materials with good periodicity, thermal and chemical stability, and electrical conductivity. However, a few OCFs have been reported owing to the limited range of precursor molecules. Herein, we designed a hexaazatrinaphthylene-based molecule with enediyne groups as a precursor molecule for synthesizing an OCF. The solid-state Bergman cyclization of enediyne groups at a low temperature formed a microporous polymer and an OCF, exhibiting redox activity and demonstrating their potential for electrochemical applications. The microporous polymer was used as an active material in sodium-ion batteries, while the OCF was used as an electrochemical capacitor. These findings illustrate the utility of the Bergman cyclization reaction for synthesizing microporous polymers and OCFs with a customizable functionality for broad applications.

    DOI： 10.1021/acsami.4c06959

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  • Diverse Hierarchical Meso/Nanoporous Pt Film Electrocatalysts Prepared via Hydrogen Adsorption-Assisted Dynamic Soft Templating International journal

    Shunsuke Shiba, Ayano Ogata, Shin Matsushita, Osamu Niwa, Masashi Kunitake, Masanobu Matsuguchi, Masato Komoda, Yuta Nishina

    Langmuir   40 ( 31 )   16349 - 16360   2024.7

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

    In this study, we present an innovative approach for creating hierarchical meso/nanoporous Pt films using dynamic soft templating. The fabrication process, called dynamic soft templating, involves Pt electrodeposition within a specialized bicontinuous microemulsion (BME) system characterized by a sophisticated three-dimensional network comprising water and oil phases, surfactants, and cosurfactants. Pt electrodeposition exclusively occurs in the water phase of the BME. This results in a porous Pt film exhibiting a nanostructure mirroring the oil solution/water solution nanostructure (solution/solution structure) of the BME, the size of which can be tailored by adjusting the BME composition. Through a simultaneous interplay of Pt electrodeposition and overpotential deposition of hydrogen (H-OPD, dissociative adsorption of water), potential-dependent Pt mesostructures are dynamically shaped. As a result, we achieve diverse morphologies in the form of hierarchical meso/nanoporous Pt films. The potential applications of the films are evaluated as electrocatalysts for the methanol oxidation reaction (MOR), and it was found that the electrocatalytic performances seem to be sensitive to nanoporosity and not relevant to mesoporosity.

    DOI： 10.1021/acs.langmuir.4c01567

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  • Enhanced thermal conductivity of fluids by percolating high-concentration few-layer graphene

    Keiko Ishii, Takahiro Ogiyama, Koji Fumoto, Yuta Nishina

    Applied Physics Letters   125 ( 2 )   2024.7

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    Publishing type：Research paper (scientific journal)   Publisher：AIP Publishing  

    High-performance and small-sized heat exchangers have been demanded due to the miniaturization and higher output of electronic devices, lasers, and energy harvesting/storage systems. Graphene nanosheet suspension has attracted attention as a next-generation nanofluid because of its high thermal conductivity and low pressure drop, while being dispersed stably without any additives. Graphene-based nanofluids have been mostly investigated using graphene oxide, and there are a few studies on pure graphene because of the limitation in mass production and stabilization at high concentrations of graphene. In this study, we prepared a 10 wt. % high-concentration few-layer graphene suspension by pulverizing graphite particles. Scanning electron microscopy, atomic force microscopy, and Raman spectra confirmed the few-layer graphene is formed in the suspension. The thermal conductivity of the suspension increased with concentration and suddenly jumped at a specific concentration. Furthermore, a significant improvement in thermal conductivity of >40% compared to base liquid was confirmed at 10 wt. % graphene content. A similar trend was observed for electrical resistance; 10 wt. % graphene suspension showed 62% lower resistance than that of 1 wt. %. These results suggest the percolation of graphene in a liquid, which has not been observed for graphene-based materials in previous research.

    DOI： 10.1063/5.0210446

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  • Size, polyglycerol grafting, and net surface charge of iron oxide nanoparticles determine their interaction and toxicity in Caenorhabditis elegans. Reviewed International journal

    Yajuan Zou, Yutaka Shikano, Yuta Nishina, Naoki Komatsu, Eriko Kage-Nakadai, Masazumi Fujiwara

    Chemosphere   358   142060 - 142060   2024.4

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    The widespread application of engineered nanoparticles (NPs) in environmental remediation has raised public concerns about their toxicity to aquatic organisms. Although appropriate surface modification can mitigate the ecotoxicity of NPs, the lack of polymer coating to inhibit toxicity completely and the insufficient knowledge about charge effect hinder the development of safe nanomaterials. Herein, we explored the potential of polyglycerol (PG) functionalization in alleviating the environmental risks of NPs. Iron oxide NPs (ION) of 20, 100, and 200 nm sizes (IONS, IONM and IONL, respectively) were grafted with PG to afford ION-PG. We examined the interaction of ION and ION-PG with Caenorhabditis elegans (C. elegans) and found that PG suppressed non-specific interaction of ION with C. elegans to reduce their accumulation and to inhibit their translocation. Particularly, IONS-PG was completely excluded from worms of all developmental stages. By covalently introducing sulfate, carboxyl and amino groups onto IONS-PG, we further demonstrated that positively charged IONS-PG-NH3+ induced high intestinal accumulation, cuticle adhesion and distal translocation, whereas the negatively charged IONS-PG-OSO3- and IONS-PG-COO- were excreted out. Consequently, no apparent deleterious effects on brood size and life span were observed in worms treated by IONS-PG and IONS-PG bearing negatively charged groups. This study presents new surface functionalization approaches for developing ecofriendly nanomaterials.

    DOI： 10.1016/j.chemosphere.2024.142060

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  • Synergistic Functionalization of Graphene Oxide: Electrochemical Devices and Ritter Catalysis

    Muhammad Sohail Ahmad, Yuta Nishina, Yusuke Inomata, Andri Haridiansyah, Tetsuya Kida

    Journal of Physical Chemistry C   128 ( 14 )   5860 - 5866   2024.4

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpcc.3c07871

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  • Effect of electrolytic conditions on the structure of exfoliated products of graphite using sulfuric acid and their ability as hydrogen production electrocatalyst supports

    Ryuichi Maekawa, Hirooki Kajiwara, Yusuke Muramatsu, Takumi Hisadome, Koki Suzaki, Yasushi Nishikawa, Naoto Kuwamura, Toshinori Okura, Yuta Nishina, Hideki Hashimoto

    Electrochimica Acta   479   2024.3

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.electacta.2024.143893

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  • Surface Modifications of Medical Grade Stainless Steel

    Nusrat Sultana, Yuta Nishina, Mohammed Zahedul Islam Nizami

    Coatings   2024.2

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    Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/coatings14030248

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  • Efficient and stable visible-light-driven Z-scheme overall water splitting using an oxysulfide H2 evolution photocatalyst International journal

    Lin, L., Ma, Y., Vequizo, J.J.M., Nakabayashi, M., Gu, C., Tao, X., Yoshida, H., Pihosh, Y., Nishina, Y., Yamakata, A., Shibata, N., Hisatomi, T., Takata, T., Domen, K.

    Nature Communications   15 ( 1 )   1146 - 1146   2024

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41467-024-44706-4

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  • A magnetically responsive photonic crystal of graphene oxide nanosheets International journal

    Daisuke Ogawa, Tomoki Nishimura, Yuta Nishina, Koki Sano

    Nanoscale   16 ( 16 )   7908 - 7915   2024

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    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Royal Society of Chemistry (RSC)  

    In this work, we systematically investigated the magnetically responsive behavior of a photonic crystal consisting of graphene oxide nanosheets and water, leading to the switching of its structural color by applying a magnetic field.

    DOI： 10.1039/d3nr06114k

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  • Enhanced OH− conductivity from 3D alkaline graphene oxide electrolytes for anion exchange membrane fuel cells

    Nonoka Goto, Mohammad Atiqur Rahman, Md. Saidul Islam, Ryuta Tagawa, Chiyu Nakano, Muhammad Sohail Ahmed, Yoshihiro Sekine, Yuta Nishina, Shintaro Ida, Shinya Hayami

    Energy Advances   2024

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    Herein, we have engineered graphene oxide through pH change and freeze drying to get three-dimensional alkaline graphene oxide, and the resulting solid electrolyte exhibited efficient anion conductivity behavior.

    DOI： 10.1039/d4ya00059e

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  • Phosphorus Release from Agricultural Drainage Sediments with Iron-Added Sediment Microbial Fuel Cells

    Gamamada Liyanage Erandi Priyangika Perera, Morihiro Maeda, Satoshi Akao, Hiroaki Somura, Chiyu Nakano, Yuta Nishina

    Journal of Water and Environment Technology   22 ( 2 )   75 - 91   2024

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    DOI： 10.2965/jwet.23-071

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  • Effects of Sediment Microbial Fuel Cells on CH<sub>4</sub> and CO<sub>2</sub> Emissions from Straw Amended Paddy Soil

    Adhena Tesfau Bekele, Morihiro Maeda, Satoshi Akao, Hiroaki Somura, Chiyu Nakano, Yuta Nishina

    Journal of Water and Environment Technology   22 ( 6 )   271 - 285   2024

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    DOI： 10.2965/jwet.24-044

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  • The use of covalent reactions to improve the biomedical applications of carbon nanomaterials

    Yajuan Zou, Yuta Nishina, Alberto Bianco

    Carbon Reports   2 ( 4 )   185 - 198   2023.12

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    DOI： 10.7209/carbon.020405

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  • 酸化グラフェンを応用した既存抗菌物質の効果持続性向上への挑戦

    加納 玄, 大久保 圭祐, 伊東 孝, 大森 一弘, 仁科 勇太, 高柴 正悟

    岡山歯学会雑誌   42 ( 2 )   76 - 77   2023.12

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  • Improved performance of strain sensors constructed by highly crystalline graphene with nanospacer

    Zizhao Xu, Yuna Himura, Chikako Ishiguro, Taiki Inoue, Nishina Yuta, Yoshihiro Kobayashi

    Japanese Journal of Applied Physics   2023.11

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    Abstract

    Graphene shows promise as an alternative material for strain sensors, due to its excellent properties, which can overcome the limitations of conventional metal ones. However, current graphene-based strain sensors were fabricated from chemically reduced graphene oxide (rGO) and suffered from low linearity and large hysteresis in sensor response as well as high initial resistance. These issues should be caused by functional groups and defects remaining on the rGO. Herein, highly crystalline rGO is employed for the fabrication of the strain sensor. The porous rGO sponge with low defect density is prepared in bulk scale via the ethanol-associated thermal process at ultra-high temperature. The obtained rGO sensor exhibits improved linearity, low initial resistance, and very small hysteresis owing to the high crystallinity of the rGO. Composite of rGO with nano-diamond, which has a role as nanospacer to separate the rGO layers, is found to be very effective to enhance the sensitivity.

    DOI： 10.35848/1347-4065/ad0cdb

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    Other Link： https://iopscience.iop.org/article/10.35848/1347-4065/ad0cdb/pdf

  • Enzyme-immobilized Screen-printed Sensor for One Drop of Sample Using Porous Silica Spheres

    Shunsuke Fujii, Akiko Yoshida, Tracy T Chuong, Yuka Minegishi, Yuta Nishina, Hirotomo Nishihara, Kouji Masumoto, Tetsuji Itoh

    Sensors and Materials   35 ( 10 )   4769 - 4769   2023.10

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    DOI： 10.18494/sam4473

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  • Highly Stretchable Stress-Strain Sensor from Elastomer Nanocomposites with Movable Cross-links and Ketjenblack. International journal

    Ryohei Ikura, Kota Kajimoto, Junsu Park, Shunsuke Murayama, Yusei Fujiwara, Motofumi Osaki, Tomohiro Suzuki, Hidenori Shirakawa, Yujiro Kitamura, Hiroaki Takahashi, Yasumasa Ohashi, Seiji Obata, Akira Harada, Yuka Ikemoto, Yuta Nishina, Yasutomo Uetsuji, Go Matsuba, Yoshinori Takashima

    ACS polymers Au   3 ( 5 )   394 - 405   2023.10

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    Practical applications like very thin stress-strain sensors require high strength, stretchability, and conductivity, simultaneously. One of the approaches is improving the toughness of the stress-strain sensing materials. Polymeric materials with movable cross-links in which the polymer chain penetrates the cavity of cyclodextrin (CD) demonstrate enhanced strength and stretchability, simultaneously. We designed two approaches that utilize elastomer nanocomposites with movable cross-links and carbon filler (ketjenblack, KB). One approach is mixing SC (a single movable cross-network material), a linear polymer (poly(ethyl acrylate), PEA), and KB to obtain their composite. The electrical resistance increases proportionally with tensile strain, leading to the application of this composite as a stress-strain sensor. The responses of this material are stable for over 100 loading and unloading cycles. The other approach is a composite made with KB and a movable cross-network elastomer for knitting dissimilar polymers (KP), where movable cross-links connect the CD-modified polystyrene (PSCD) and PEA. The obtained composite acts as a highly sensitive stress-strain sensor that exhibits an exponential increase in resistance with increasing tensile strain due to the polymer dethreading from the CD rings. The designed preparations of highly repeatable or highly responsive stress-strain sensors with good mechanical properties can help broaden their application in electrical devices.

    DOI： 10.1021/acspolymersau.3c00010

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  • Unveiling the Reduction Process of Graphene Oxide by Ascorbic Acid: Grafting and Reduction Sequences for High Surface Area Graphene Materials. International journal

    Israel Ortiz-Anaya, Yuta Nishina

    ChemPlusChem   88 ( 8 )   e202300328   2023.8

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    This work reports the synthesis of high surface area reduced graphene oxides using L-ascorbic acid as a reducing agent by precisely controlling the interaction between graphene oxide and L-ascorbic acid. Based on the structural characterization, such as textural properties (specific surface area, pore structure), crystallinity, and carbon chemical state, we identified that the temperature and reaction time are critical parameters to control the stacking degree of the final reduced product. Besides, by performing a time course analysis of the reaction, we identified the side products of the reducing agent by LC-MS and verified the reduction mechanism. Following our results, we proposed an optimum condition for producing a graphene derivative adsorbent with a high surface area. This graphene derivative was tested in an aqueous solution with organic and inorganic pollutants such as methylene blue, methyl orange, and cadmium.

    DOI： 10.1002/cplu.202300328

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  • Effects of oxidation treatment of biochars derived from different raw materials and pyrolysis temperatures on nitrous oxide emission from soil Reviewed

    Yuki Masukura, Morihiro Maeda, Chiyu Nakano, Hiroaki Somura, Shinzo Yamane, Yuta Nishina

    Japanese Journal of Soil Science and Plant Nutrition   94 ( 4 )   245 - 253   2023.8

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    DOI： 10.20710/dojo.94.4_245

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  • Countercation Engineering of Graphene-Oxide Nanosheets for Imparting a Thermoresponsive Ability International journal

    Shoma Kondo, Tomoki Nishimura, Yuta Nishina, Koki Sano

    ACS Applied Materials & Interfaces   15 ( 31 )   37837 - 37844   2023.7

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    Graphene-oxide (GO) nanosheets, which are oxidized derivatives of graphene, are regarded as promising building blocks for functional soft materials. Especially, thermoresponsive GO nanosheets have been widely employed to develop smart membranes/surfaces, hydrogel actuators, recyclable systems, and biomedical applications. However, current synthetic strategies to generate such thermoresponsive GO nanosheets have exclusively relied on the covalent or non-covalent modification of their surfaces with thermoresponsive polymers, such as poly(N-isopropylacrylamide). To impart a thermoresponsive ability to GO nanosheets themselves, we focused on the countercations of the carboxy and acidic hydroxy groups on the GO nanosheets. In this study, we established a general and reliable method to synthesize GO nanosheets with target countercations and systematically investigated their effects on thermoresponsive behaviors of GO nanosheets. As a result, we discovered that GO nanosheets with Bu4N+ countercations became thermoresponsive in water without the use of any thermoresponsive polymers, inducing a reversible sol-gel transition via their self-assembly and disassembly processes. Owing to the sol-gel transition capability, the resultant dispersion can be used as a direct writing ink for constructing a three-dimensionally designable gel architecture of the GO nanosheets. Our concept of "countercation engineering" can become a new strategy for imparting a stimuli-responsive ability to various charged nanomaterials for the development of next-generation smart materials.

    DOI： 10.1021/acsami.3c07820

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  • Graphene Oxide-BODIPY Conjugates as Highly Fluorescent Materials International journal

    Giacomo Reina, Giovanni Mariano Beneventi, Ramandeep Kaur, Giacomo Biagiotti, Alejandro Cadranel, Cécilia Ménard-Moyon, Yuta Nishina, Barbara Richichi, Dirk M. Guldi, Alberto Bianco

    Chemistry - A European Journal   29 ( 31 )   e202300266   2023.6

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    DOI： 10.1002/chem.202300266

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  • Development of Microdrip Enzyme Device Using Carbon-Coated Porous Silica Spheres

    Shunsuke Fujii, Akiko Yoshida, Tracy T. Chuong, Yuka Minegishi, Kritin Pirabul, Zheng-Ze Pan, Yuta Nishina, Takashi Kyotani, Hirotomo Nishihara, Kouji Masumoto, Galen D. Stucky, Tetsuji Itoh

    ACS Applied Engineering Materials   1 ( 5 )   1426 - 1435   2023.5

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    DOI： 10.1021/acsaenm.3c00103

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  • Functional Graphene for Peritumoral Brain Microenvironment Modulation Therapy in Glioblastoma International journal

    Shan Min Chin, Giacomo Reina, Ngoc Do Quyen Chau, Tanguy Chabrol, Didier Wion, Ali Bouamrani, Emmanuel Gay, Yuta Nishina, Alberto Bianco, François Berger

    Small   19 ( 18 )   e2208227   2023.5

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    DOI： 10.1002/smll.202208227

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  • Ball mill enhances the functionalization of boron nitride: The application for polyimide fillers

    Yi Kai Cheng, Seiji Obata, Yuta Nishina

    FlatChem   39   2023.5

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    DOI： 10.1016/j.flatc.2023.100489

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  • Edge-Site-Free and Topological-Defect-Rich Carbon Cathode for High-Performance Lithium-Oxygen Batteries. International journal

    Wei Yu, Takeharu Yoshii, Alex Aziz, Rui Tang, Zheng-Ze Pan, Kazutoshi Inoue, Motoko Kotani, Hideki Tanaka, Eva Scholtzová, Daniel Tunega, Yuta Nishina, Kiho Nishioka, Shuji Nakanishi, Yi Zhou, Osamu Terasaki, Hirotomo Nishihara

    Advanced science (Weinheim, Baden-Wurttemberg, Germany)   10 ( 16 )   e2300268   2023.4

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    DOI： 10.1002/advs.202300268

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  • Plasma-Derived Fibrin Hydrogels Containing Graphene Oxide for Infections Treatment International journal

    Cristina Martín, Ariadna Bachiller, Juan P. Fernández-Blázquez, Yuta Nishina, José L. Jorcano

    ACS Materials Letters   5 ( 4 )   1245 - 1255   2023.4

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    DOI： 10.1021/acsmaterialslett.2c01044

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  • Mechanisms of Radical Formation on Chemically Modified Graphene Oxide under Near Infrared Irradiation International journal

    Lucas Jacquemin, Zhengmei Song, Nolwenn Le Breton, Yuta Nishina, Sylvie Choua, Giacomo Reina, Alberto Bianco

    Small   19 ( 16 )   e2207229   2023.4

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    DOI： 10.1002/smll.202207229

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  • Dynamic nuclear polarization – nuclear magnetic resonance for analyzing surface functional groups on carbonaceous materials

    Hideka Ando, Katsuaki Suzuki, Hironori Kaji, Takashi Kambe, Yuta Nishina, Chiyu Nakano, Kazuma Gotoh

    Carbon   206   84 - 93   2023.3

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    DOI： 10.1016/j.carbon.2023.02.010

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  • Self-Assembly Strategies for Graphene Oxide/Silica Nanostructures: Synthesis and Structural Analysis

    Yuki Takeuchi, Kentaro Ohkura, Yuta Nishina

    Bulletin of the Chemical Society of Japan   96 ( 2 )   113 - 119   2023.2

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    DOI： 10.1246/bcsj.20220279

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  • Non-enzymatic detection of glucose levels in human blood plasma by a graphene oxide-modified organic transistor sensor International journal

    Haonan Fan, Yui Sasaki, Qi Zhou, Wei Tang, Yuta Nishina, Tsuyoshi Minami

    Chemical Communications   59 ( 17 )   2425 - 2428   2023.1

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    DOI： 10.1039/d2cc07009j

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  • Angstrom-Confined Electrochemical Synthesis of Sub-Unit-Cell Non-Van Der Waals 2D Metal Oxides International journal

    Dali Ji, Yunah Lee, Yuta Nishina, Kazuhide Kamiya, Rahman Daiyan, Dewei Chu, Xinyue Wen, Masamichi Yoshimura, Priyank Kumar, Daria V. Andreeva, Kostya S. Novoselov, Gwan Hyoung Lee, Rakesh Joshi, Tobias Foller

    Advanced Materials   35 ( 30 )   e2301506   2023

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    DOI： 10.1002/adma.202301506

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  • Polymyxin B complexation enhances the antimicrobial potential of graphene oxide. International journal

    Santosh Pandit, Lucas Jacquemin, Jian Zhang, Zhengfeng Gao, Yuta Nishina, Rikke Louise Meyer, Ivan Mijakovic, Alberto Bianco, Chengfang Pang

    Frontiers in cellular and infection microbiology   13   1209563 - 1209563   2023

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    INTRODUCTION: The antibacterial activity of graphene oxide (GO) has been widely explored and tested against various pathogenic bacterial strains. Although antimicrobial activity of GO against planktonic bacterial cells was demonstrated, its bacteriostatic and bactericidal effect alone is not sufficient to damage sedentary and well protected bacterial cells inside biofilms. Thus, to be utilized as an effective antibacterial agent, it is necessary to improve the antibacterial activity of GO either by integration with other nanomaterials or by attachment of antimicrobial agents. In this study, antimicrobial peptide polymyxin B (PMB) was adsorbed onto the surface of pristine GO and GO functionalized with triethylene glycol. METHODS: The antibacterial effects of the resulting materials were examined by evaluating minimum inhibitory concentration, minimum bactericidal concentration, time kill assay, live/dead viability staining and scanning electron microscopy. RESULTS AND DISCUSSION: PMB adsorption significantly enhanced the bacteriostatic and bactericidal activity of GO against both planktonic cells and bacterial cells in biofilms. Furthermore, the coatings of PMB-adsorbed GO applied to catheter tubes strongly mitigated biofilm formation, by preventing bacterial adhesion and killing the bacterial cells that managed to attach. The presented results suggest that antibacterial peptide absorption can significantly enhance the antibacterial activity of GO and the resulting material can be effectively used not only against planktonic bacteria but also against infectious biofilms.

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  • Erratum: Bonding of Neuropeptide Y on Graphene Oxide for Drug Delivery Applications to the Central Nervous System (ACS Applied Nano Materials (2022) 5: 12 (17640−17651) DOI: 10.1021/acsanm.2c03409)

    Cellot, G., Jacquemin, L., Reina, G., Franceschi Biagioni, A., Fontanini, M., Chaloin, O., Nishina, Y., Bianco, A., Ballerini, L.

    ACS Applied Nano Materials   6 ( 9 )   8105 - 8105   2023

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    DOI： 10.1021/acsanm.3c01600

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  • Photocatalytic Dehydrogenation of N-Heterocycles Promoted by Radicals from Graphene Oxide

    Ahmed, M.R., Nishina, Y.

    Bulletin of the Chemical Society of Japan   96 ( 6 )   2023

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    DOI： 10.1246/bcsj.20230059

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  • Iron-Added Sediment Microbial Fuel Cells to Suppress Phosphorus Release from Sediment in an Agricultural Drainage

    Perera, G.L.E.P., Maeda, M., Somura, H., Nakano, C., Nishina, Y.

    Journal of Water and Environment Technology   21 ( 5 )   2023

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    DOI： 10.2965/JWET.23-040

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  • Bonding of Neuropeptide Y on Graphene Oxide for Drug Delivery Applications to the Central Nervous System International journal

    Giada Cellot, Lucas Jacquemin, Giacomo Reina, Audrey Franceschi Biagioni, Mario Fontanini, Olivier Chaloin, Yuta Nishina, Alberto Bianco, Laura Ballerini

    ACS Applied Nano Materials   5 ( 12 )   17640 - 17651   2022.12

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    DOI： 10.1021/acsanm.2c03409

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  • Graphene Oxide-based Endodontic Sealer: An in Vitro Study.

    Mohammed Zahedul Islam Nizami, Melahat Gorduysus, Yuki Shinoda-Ito, Tadashi Yamamoto, Yuta Nishina, Shogo Takashiba, Zulema Arias

    Acta medica Okayama   76 ( 6 )   715 - 721   2022.12

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    The failure of endodontic treatment is directly associated with microbial infection in the root canal or periapical areas. An endodontic sealer that is both bactericidal and biocompatible is essential for the success of root canal treatments. This is one of the vital issues yet to be solved in clinical dental practice. This in vitro study assessed the effectiveness of graphene oxide (GO) composites GO-CaF2 and GO-Ag-CaF2 as endodontic sealer materials. Dentin slices were coated with either the GO-based composites or commonly used root canal sealers (non-eugenol zinc oxide sealer). The coated slices were treated in 0.9% NaCl, phosphate-buffered saline (PBS), and simulated body fluid (SBF) at 37˚C for 24 hours to compare their sealing effect on the dentin surface. In addition, the radiopacity of these composites was examined to assess whether they complied with the requirements of a sealer for good radiographic visualization. Scanning electron microscopy showed the significant sealing capability of the composites as coating materials. Radiographic images confirmed their radiopacity. Mineral deposition indicated their bioactivity, especially of GO-Ag-CaF2, and thus it is potential for regenerative application. They were both previously shown to be bactericidal to oral microbes and cytocompatible with host cells. With such a unique assemblage of critical properties, these GO-based composites show promise as endodontic sealers for protection against reinfection in root canal treatment and enhanced success in endodontic treatment overall.

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  • 酸化グラフェンと塩化セチルピリジニウムを応用した不織布マスクの抗菌性

    越宗 朋隆, 伊東 有希[信田], 仁科 勇太, 高柴 正悟

    岡山歯学会雑誌   41 ( 2 )   60 - 61   2022.12

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  • In Situ Synthesis of Ultrathin Amorphous Silica Nanosheet with Large Specific Surface Area on Graphene Oxide

    Yuki Takeuchi, Seiji Obata, Kentaro Ohkura, Yuta Nishina

    ACS Materials Letters   4 ( 12 )   2590 - 2596   2022.11

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    DOI： 10.1021/acsmaterialslett.2c00805

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  • Stacking order reduction in multilayer graphene by inserting nanospacers

    Zizhao Xu, Taiki Inoue, Yuta Nishina, Yoshihiro Kobayashi

    Journal of Applied Physics   132 ( 17 )   174305 - 174305   2022.11

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    Toward macroscopic applications of graphene, it is desirable to preserve the superior properties of single-layer graphene in bulk scale. However, the AB-stacking structure is thermodynamically favored for multilayer graphene and causes strong interlayer interactions, resulting in property degradation. A promising approach to prevent the strong interlayer interaction is the staking order reduction of graphene, where the graphene layers are rotated in-plane to form a randomly stacking structure. In this study, we propose a strategy to effectively decrease the stacking order of multilayer graphene by incorporating nanospacers, cellulose nanofibers, or nano-diamonds (NDs) in the formation process of porous graphene sponges. We conducted an ultrahigh temperature treatment at 1500 °C with ethanol vapor for the reduction and structural repair of graphene oxide sponges with different concentrations of the nanospacers. Raman spectroscopy indicated an obvious increase in the random-stacking fraction of graphene by adding the nanospacers. The x-ray diffraction (XRD) analysis revealed that a small amount of the nanospacers induced a remarkable decrease in ordered graphene crystalline size in the stacking direction. It was also confirmed that a layer-number increase during the thermal treatment was suppressed by the nanospacers. The increase in the random-stacking fraction is attributed to the efficient formation of randomly rotated graphene through the ethanol-mediated structural restoration of relatively thin layers induced by the nanospacers. This stacking-order-reduced graphene with bulk scale is expected to be used in macroscopic applications, such as electrode materials and wearable devices.

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  • Electrodeposition of hydroxyapatite and graphene oxide improves the bioactivity of medical grade stainless steel

    M. Z.I. Nizami, B. D.L. Campéon, Y. Nishina

    Materials Today Sustainability   19   2022.11

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    DOI： 10.1016/j.mtsust.2022.100193

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  • Fabrication of binderless electrodes via non-destructive electrochemical oxidation/reduction of graphite sheets using BF<inf>4</inf> salts

    Masato Komoda, Yuta Nishina

    Electrochimica Acta   430   2022.10

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    DOI： 10.1016/j.electacta.2022.141087

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  • Development of a Multitimescale Time-Resolved Electron Diffraction Setup: Photoinduced Dynamics of Oxygen Radicals on Graphene Oxide International journal

    Yuri Saida, Ryo Shikata, Kaito En-Ya, Satoshi Ohmura, Yuta Nishina, Masaki Hada

    Journal of Physical Chemistry A   126 ( 36 )   6301 - 6308   2022.9

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    DOI： 10.1021/acs.jpca.2c04075

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  • Optimizing the structure and molecular weight of polymers for graphene dispersants

    Shimpei Takeda, Yuta Nishina

    Polymer Journal   54 ( 11 )   1377 - 1381   2022.8

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    DOI： 10.1038/s41428-022-00684-2

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  • Combined Photothermal and Photodynamic Therapy for Cancer Treatment Using a Multifunctional Graphene Oxide International journal

    Shi Guo, Zhengmei Song, Ding-Kun Ji, Giacomo Reina, Jean-Daniel Fauny, Yuta Nishina, Cecilia Menard-Moyon, Alberto Bianco

    Pharmaceutics   14 ( 7 )   2022.7

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    DOI： 10.3390/pharmaceutics14071365

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  • Growth of ZIF-8 Nanoparticles In Situ on Graphene Oxide Nanosheets: A Multifunctional Nanoplatform for Combined Ion-Interference and Photothermal Therapy International journal

    Chunxu Lv, Wenyan Kang, Shuo Liu, Pishan Yang, Yuta Nishina, Shaohua Ge, Alberto Bianco, Baojin Ma

    ACS Nano   16 ( 7 )   11428 - 11443   2022.7

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    DOI： 10.1021/acsnano.2c05532

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  • Nanocellulose Paper Semiconductor with a 3D Network Structure and Its Nano–Micro–Macro Trans-Scale Design

    Hirotaka Koga, Kazuki Nagashima, Koichi Suematsu, Tsunaki Takahashi, Luting Zhu, Daiki Fukushima, Yintong Huang, Ryo Nakagawa, Jiangyang Liu, Kojiro Uetani, Masaya Nogi, Takeshi Yanagida, Yuta Nishina

    ACS Nano   16 ( 6 )   8630 - 8640   2022.6

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    DOI： 10.1021/acsnano.1c10728

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  • Synergic effect of graphene oxide and boron nitride on the mechanical properties of polyimide composite films International journal

    Yi Kai Cheng, Benoit Denis Louis Campeon, Seiji Obata, Yuta Nishina

    Nanoscale Advances   4 ( 10 )   2339 - 2345   2022.5

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    DOI： 10.1039/d2na00078d

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  • Graphene Oxide-Based Multi-Component Antimicrobial Hydrogels

    Mohammed Zahedul Islam Nizami, Benoit Denis Louis Campeon, Akira Satoh, Yuta Nishina

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   95 ( 5 )   713 - 720   2022.5

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    DOI： 10.1246/bcsj.20220017

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  • Surface Functionalities of Graphene Oxide with Varying Flake Size

    Yee Yee Khine, Xiaojun Ren, Dewei Chu, Yuta Nishina, Tobias Foller, Rakesh Joshi

    INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH   61 ( 19 )   6531 - 6536   2022.5

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  • Grafting redox-active molecules on graphene oxide through a diamine linker: length optimization for electron transfer

    Rizwan Khan, Yuta Nishina

    DALTON TRANSACTIONS   51 ( 5 )   1874 - 1878   2022.2

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    DOI： 10.1039/d1dt03197j

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  • Uniform coating of magnesium oxide crystal with reduced graphene oxide achieves moisture barrier performance

    Akinori Saito, Seiji Obata, Yuta Nishina

    Applied Surface Science   573   2022.1

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    DOI： 10.1016/j.apsusc.2021.151483

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  • Oxidation-degree-dependent moisture-induced actuation of a graphene oxide film

    Waka Nakanishi, Yoshihiro Yamauchi, Yuta Nishina, Masafumi Yoshio, Masayuki Takeuchi

    RSC ADVANCES   12 ( 6 )   3372 - 3379   2022.1

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  • Design of a graphene oxide-BODIPY conjugate for glutathione depletion and photodynamic therapy

    Giacomo Reina, Amalia Ruiz, Barbara Richichi, Giacomo Biagiotti, Gina E. Giacomazzo, Lucas Jacquemin, Yuta Nishina, Cecilia Menard-Moyon, Wafa T. Al-Jamal, Alberto Bianco

    2D MATERIALS   9 ( 1 )   2022.1

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  • Synthesis of microporous polymers with exposed C60 surfaces by polyesterification of fullerenol

    Hirotomo Nishihara, Akio Harigaya, Alberto Castro-Muñiz, Mao Ohwada, Takashi Kyotani, Yuta Nishina

    Chemical Communications   58 ( 50 )   7086 - 7089   2022

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  • A novel mechanical plant compression system for biomass fuel and acquisition of squeezed liquid with water-soluble lignin as anti-virus materials

    Toshiaki Ohara, Ken Yuasa, Kentaro Kimura, Shiho Komaki, Yuta Nishina, Akihiro Matsukawa

    Journal of Material Cycles and Waste Management   25 ( 1 )   249 - 257   2022

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  • Room-Temperature Ring-Opening Polymerization of δ-Valerolactone and ϵ-Caprolactone Caused by Uptake into Porous Pillar[5]arene Crystals International journal

    Kenichi Kato, Koki Maeda, Motohiro Mizuno, Yuta Nishina, Shixin Fa, Shunsuke Ohtani, Tomoki Ogoshi

    Angewandte Chemie - International Edition   61 ( 50 )   e202212874   2022

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  • Synthesis and Characterization of Graphene Oxide-Cellulose Based Aerogels

    Ha Le, H.K., Vy Nguyen, L.T., Ngoc Phung, T.B., Quen, K., Nishina, Y., Ha Huynh, K.P., Nguyen, T.S., Quyen Chau, N.D.

    Chemical Engineering Transactions   97   2022

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  • The carbonization of aromatic molecules with three-dimensional structures affords carbon materials with controlled pore sizes at the Ångstrom-level

    Tomoki Ogoshi, Yuma Sakatsume, Katsuto Onishi, Rui Tang, Kazuma Takahashi, Hirotomo Nishihara, Yuta Nishina, Benoît D.L. Campéon, Takahiro Kakuta, Tada Aki Yamagishi

    Communications Chemistry   4 ( 1 )   2021.12

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  • Bulk-scale synthesis of randomly stacked graphene with high crystallinity

    Zizhao Xu, Shingo Nakamura, Taiki Inoue, Yuta Nishina, Yoshihiro Kobayashi

    CARBON   185   368 - 375   2021.11

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  • Tracking the light-driven layer stacking of graphene oxide

    Masaki Hada, Satoshi Ohmura, Yuki Yamamoto, Yoshiya Kishibe, Wataru Yajima, Ryo Shikata, Tomohiro Iguchi, Keishi Akada, Shoji Yoshida, Jun ichi Fujita, Shin ya Koshihara, Yuta Nishina

    Carbon   183   612 - 619   2021.10

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    DOI： 10.1016/j.carbon.2021.07.058

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  • Disposable electrochemical glucose sensor based on water-soluble quinone-based mediators with flavin adenine dinucleotide-dependent glucose dehydrogenase

    Jannatul Morshed, Ryo Nakagawa, Motaher M. Hossain, Yuta Nishina, Seiya Tsujimura

    Biosensors and Bioelectronics   189   2021.10

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    DOI： 10.1016/j.bios.2021.113357

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  • Grafting chelating groups on 2D carbon for selective heavy metal adsorption International journal

    Risa Shibahara, Kazuhide Kamiya, Yuta Nishina

    Nanoscale Advances   3 ( 20 )   5823 - 5829   2021.10

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    DOI： 10.1039/d1na00435b

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  • Covalent double functionalization of graphene oxide for proton conductive and redox-active functions

    Rizwan Khan, Keita Miyagawa, Alberto Bianco, Yuta Nishina

    Applied Materials Today   24   2021.9

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    DOI： 10.1016/j.apmt.2021.101120

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  • Enabling the fast lithium storage of large-scalable gamma-Fe2O3/Carbon nanoarchitecture anode material with an ultralong cycle life

    Sadeeq Ullah, Benoit D. L. Campeon, Shumaila Ibraheem, Ghulam Yasin, Rajesh Pathak, Yuta Nishina, Tuan Anh Nguyen, Yassine Slimani, Qipeng Yuan

    Journal of Industrial and Engineering Chemistry   101   379 - 386   2021.9

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  • Insights into carbon nanotube-assisted electro-oxidation of polycyclic aromatic hydrocarbons for mediated bioelectrocatalysis

    Paulo Henrique M. Buzzetti, Pierre-Yves Blanchard, Emerson Marcelo Girotto, Yuta Nishina, Serge Cosnier, Alan Le Goff, Michael Holzinger

    Chemical Communications   57 ( 71 )   8957 - 8960   2021.9

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  • High valence states of Pd supported on ferroelectric BaTiO3 driven by electric polarization

    Tasuku Yoshida, Jun Kano, Masaichiro Mizumaki, Yusuke Tamenori, Kiyofumi Nitta, Kazuo Kato, Satoshi Hinokuma, Norihiro Oshime, Satoshi Hirose, Hitoshi Mikami, Naoshi Ikeda, Tatsuo Fujii, Yuta Nishina, Tomoko Okubo

    Applied Physics Letters   119 ( 9 )   092904 - 092904   2021.8

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  • Simulating the redox potentials of unexplored phenazine derivatives as electron mediators for biofuel cells

    Ryo Nakagawa, Yuta Nishina

    JPhys Energy   3 ( 3 )   2021.7

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    DOI： 10.1088/2515-7655/abebc8

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  • Constructing monolithic sulfur cathodes with multifunctional N,P dual-doped carbon nanocages to achieve high-areal-capacity lithium-sulfur batteries

    Lingyu Du, Xiongcan Deng, Xueyi Cheng, Liwei Liu, Qiang Wu, Lijun Yang, Xizhang Wang, Yuta Nishina, Zheng Hu

    FlatChem   28   2021.7

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    DOI： 10.1016/j.flatc.2021.100253

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  • A glutathione responsive nanoplatform made of reduced graphene oxide and MnO<inf>2</inf> nanoparticles for photothermal and chemodynamic combined therapy

    Baojin Ma, Yuta Nishina, Alberto Bianco

    Carbon   178   783 - 791   2021.6

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    DOI： 10.1016/j.carbon.2021.03.065

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  • High-sorption terpyridine-graphene oxide hybrid for the efficient removal of heavy metal ions from wastewater

    Dawid Pakulski, Adam Gorczyński, Dawid Marcinkowski, Włodzimierz Czepa, Tomasz Chudziak, Samanta Witomska, Yuta Nishina, Violetta Patroniak, Artur Ciesielski, Paolo Samorì

    Nanoscale   13 ( 23 )   10490 - 10499   2021.6

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  • Fiber-crafted biofuel cell bracelet for wearable electronics

    Sijie Yin, Xiaohan Liu, Tatsuya Kaji, Yuta Nishina, Takeo Miyake

    Biosensors and Bioelectronics   179   2021.5

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    DOI： 10.1016/j.bios.2021.113107

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  • Biodegradation of graphene materials catalyzed by human eosinophil peroxidase

    Rajendra Kurapati, Cristina Martìn, Vincenzo Palermo, Yuta Nishina, Alberto Bianco

    Faraday Discussions   227   189 - 203   2021.4

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  • REDOX ACTIVITY OF GRAPHENE OXIDE ANALOGUES IN ORGANIC REACTIONS

    Yuta Nishina

    CARBON   175   606 - 606   2021.4

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  • High-density monolithic pellets of double-sided graphene fragments based on zeolite-templated carbon

    Atsushi Gabe, Mohammed Ouzzine, Erin E. Taylor, Nicholas P. Stadie, Naoki Uchiyama, Tomomi Kanai, Yuta Nishina, Hideki Tanaka, Zheng Ze Pan, Takashi Kyotani, Hirotomo Nishihara

    Journal of Materials Chemistry A   9 ( 12 )   7503 - 7507   2021.3

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  • Enhanced photocatalytic activity and stability of TiO<inf>2</inf>/graphene oxide composites coatings by electrophoresis deposition

    Sujun Guan, Liang Hao, Hiroyuki Yoshida, Takaomi Itoi, Yanling Cheng, Satoshi Seki, Yuta Nishina, Yun Lu

    Materials Letters   286   2021.3

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    DOI： 10.1016/j.matlet.2020.129258

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  • Electrochemical Production of Graphene Analogs from Various Graphite Materials

    Masato Komoda, Yuta Nishina

    CHEMISTRY LETTERS   50 ( 3 )   503 - 509   2021.3

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  • Light reflectance and photoelectron yield spectroscopy enable acceptor level measurement in p-type Ba<inf>1-x</inf>TiO<inf>3</inf>semiconductor

    Saya Fujii, Jun Kano, Norihiro Oshime, Tohru Higuchi, Yuta Nishina, Tatsuo Fujii, Naoshi Ikeda, Hiromi Ota

    Journal of Applied Physics   129 ( 8 )   2021.2

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  • Exploring Structures and Dynamics of Molecular Assemblies: Ultrafast Time-Resolved Electron Diffraction Measurements

    Masaki Hada, Yuta Nishina, Takashi Kato

    Accounts of Chemical Research   54 ( 3 )   731 - 743   2021.2

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    DOI： 10.1021/acs.accounts.0c00576

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  • Co and Ni assisted CdS@g-C<inf>3</inf>N<inf>4</inf> nanohybrid: A photocatalytic system for efficient hydrogen evolution reaction

    Jamal Abdul Nasir, Noor Islam, Zia ur Rehman, Ian S. Butler, Akhtar Munir, Yuta Nishina

    Materials Chemistry and Physics   259   2021.2

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    DOI： 10.1016/j.matchemphys.2020.124140

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  • Reaction between Graphene Oxide and Intracellular Glutathione Affects Cell Viability and Proliferation

    Baojin Ma, Shi Guo, Yuta Nishina, Alberto Bianco

    ACS Applied Materials and Interfaces   13 ( 3 )   3528 - 3535   2021.1

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    DOI： 10.1021/acsami.0c17523

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  • Pure electric and magnetic fields applied to reduced graphene oxide for defect repair and oxygen removal

    Takeshi Miyata, Syun Gohda, Takashi Fujii, Hironobu Ono, Hibiki Itoh, Yuta Nishina, Keiichiro Kashimura

    Carbon   171   10 - 15   2021.1

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    DOI： 10.1016/j.carbon.2020.08.044

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  • Adsorption enhancement of nitrogen gas by atomically heterogeneous nanospace of boron nitride

    Jun Kimura, Takahiro Ohkubo, Yuta Nishina, Koki Urita, Yasushige Kuroda

    RSC Advances   11 ( 2 )   838 - 846   2020.12

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    DOI： 10.1039/d0ra08437a

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  • Sophisticated rGO synthesis and pre-lithiation unlocking full-cell lithium-ion battery high-rate performances

    Benoît Denis Louis Campéon, Yumi Yoshikawa, Takashi Teranishi, Yuta Nishina

    Electrochimica Acta   363   2020.12

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    DOI： 10.1016/j.electacta.2020.137257

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  • Diazonium Electrografting vs. Physical Adsorption of Azure A at Carbon Nanotubes for Mediated Glucose Oxidation with FAD-GDH

    Andrew J. Gross, Shunya Tanaka, Clara Colomies, Fabien Giroud, Yuta Nishina, Serge Cosnier, Seiya Tsujimura, Michael Holzinger

    ChemElectroChem   7 ( 22 )   4543 - 4549   2020.11

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  • Iron nanoparticle templates for constructing 3D graphene framework with enhanced performance in sodium-ion batteries International journal

    Benoît D.L. Campéon, Chen Wang, Yuta Nishina

    Nanoscale   12 ( 42 )   21780 - 21787   2020.11

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    DOI： 10.1039/d0nr05682k

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  • Analyzing dynamic chemical states of palladium supported on graphene oxide by X-ray absorption fine structure under oxidative and reductive environments

    Masahiro Kunisu, Jumpei Yahiro, Naoki Morimoto, Yuta Nishina

    Chemistry Letters   49 ( 11 )   1337 - 1340   2020.11

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    DOI： 10.1246/CL.200529

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  • A needle-type biofuel cell using enzyme/mediator/carbon nanotube composite fibers for wearable electronics

    Sijie Yin, Xiaohan Liu, Yuka Kobayashi, Yuta Nishina, Ryo Nakagawa, Ryoji Yanai, Kazuhiro Kimura, Takeo Miyake

    Biosensors and Bioelectronics   165   2020.10

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    DOI： 10.1016/j.bios.2020.112287

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  • Bottom-up synthesis of nitrogen-doped nanocarbons by a combination of metal catalysis and a solution plasma process

    Yang Zhou, Yuta Nishina

    Nanoscale Advances   2 ( 10 )   4417 - 4420   2020.10

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    DOI： 10.1039/d0na00327a

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  • Is carboxylation an efficient method for graphene oxide functionalization?

    Shi Guo, Jésus Raya, Dingkun Ji, Yuta Nishina, Cécilia Ménard-Moyon, Alberto Bianco

    Nanoscale Advances   2 ( 9 )   4085 - 4092   2020.9

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  • Grafting conductive polymers on graphene oxide through cross-linker: A stepwise approach

    Rizwan Khan, Yuta Nishina

    Journal of Materials Chemistry A   8 ( 27 )   13718 - 13724   2020.7

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    DOI： 10.1039/d0ta05489e

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  • Chemical and electrochemical synthesis of graphene oxide-a generalized view International journal

    Yuta Nishina, Siegfried Eigler

    Nanoscale   12 ( 24 )   12731 - 12740   2020.6

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    DOI： 10.1039/d0nr02164d

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  • Carbon-rich materials with three-dimensional ordering at the angstrom level Reviewed

    Shixin Fa, Masanori Yamamoto, Hirotomo Nishihara, Hirotomo Nishihara, Ryota Sakamoto, Kazuhide Kamiya, Kazuhide Kamiya, Yuta Nishina, Tomoki Ogoshi, Tomoki Ogoshi

    Chemical Science   11 ( 23 )   5866 - 5873   2020.6

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    DOI： 10.1039/d0sc02422h

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  • Graphene-based carbocatalysts for carbon-carbon bond formation International journal

    Muhammad Sohail Ahmad, Yuta Nishina

    Nanoscale   12 ( 23 )   12210 - 12227   2020.6

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    DOI： 10.1039/d0nr02984j

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  • Tailoring the interaction between graphene oxide and antibacterial pyridinium salts by terminal functional groups

    R. Fujii, K. Okubo, S. Takashiba, A. Bianco, Y. Nishina

    Carbon   160   204 - 210   2020.4

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    DOI： 10.1016/j.carbon.2019.11.094

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  • A Simple and Robust Functionalization of Graphene for Advanced Energy Devices International journal

    Rizwan Khan, Ryo Nakagawa, Benoit Campeon, Yuta Nishina

    ACS Applied Materials and Interfaces   12 ( 11 )   12736 - 12742   2020.3

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    DOI： 10.1021/acsami.9b21082

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  • Non-destructive, uniform, and scalable electrochemical functionalization and exfoliation of graphite Reviewed

    Benoît D.L. Campéon, Mitsuo Akada, Muhammed S. Ahmad, Yasushi Nishikawa, Kazuma Gotoh, Yuta Nishina

    Carbon   158   356 - 363   2020.3

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    DOI： 10.1016/j.carbon.2019.10.085

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  • Structural optimization of alkylbenzenes as graphene dispersants

    Shimpei Takeda, Yuta Nishina

    Processes   8 ( 2 )   2020.2

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  • Functionalized Graphene Oxide Shields Tooth Dentin from Decalcification

    M. Z.I. Nizami, Y. Nishina, T. Yamamoto, Y. Shinoda-Ito, S. Takashiba

    Journal of Dental Research   99 ( 2 )   182 - 188   2020.2

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  • A Flexible Method for Covalent Double Functionalization of Graphene Oxide International journal

    Shi Guo, Yuta Nishina, Alberto Bianco, Cécilia Ménard-Moyon

    Angewandte Chemie - International Edition   59 ( 4 )   1542 - 1547   2020.1

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    DOI： 10.1002/anie.201913461

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  • Robust sandwiched fluorinated graphene for highly reliable flexible electronics

    Mamina Sahoo, Jer Chyi Wang, Yuta Nishina, Zhiwei Liu, Jong Shing Bow, Chao Sung Lai

    Applied Surface Science   499   2020.1

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    DOI： 10.1016/j.apsusc.2019.143839

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  • Dehydrogenative Coupling of Toluene Promoted by Multi-Walled Carbon Nanotubes

    Soliman I. El-Hout, Yang Zhou, Jun Kano, Yoshiaki Uchida, Yuta Nishina

    Catalysis Letters   150 ( 1 )   256 - 262   2020.1

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    DOI： 10.1007/s10562-019-02951-z

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  • Unveiling the Mechanism of Polymer Grafting on Graphene for Functional Composites: The Behavior of Radicals International journal

    Yuki Hori, Koichiro Kubo, Yuta Nishina

    Macromolecular Rapid Communications   42 ( 8 )   e2000577   2020

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    DOI： 10.1002/marc.202000577

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  • Dorsal-to-Ventral Cortical Expansion Is Physically Primed by Ventral Streaming of Early Embryonic Preplate Neurons

    Kanako Saito, Mayumi Okamoto, Yuto Watanabe, Namiko Noguchi, Arata Nagasaka, Yuta Nishina, Tomoyasu Shinoda, Akira Sakakibara, Takaki Miyata

    CELL REPORTS   29 ( 6 )   1555 - +   2019.11

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    DOI： 10.1016/j.celrep.2019.09.075

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  • Selective Hydrogenation by Carbocatalyst: The Role of Radicals. International journal

    Muhammad Sohail Ahmad, Huixin He, Yuta Nishina

    Organic letters   21 ( 20 )   8164 - 8168   2019.10

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    DOI： 10.1021/acs.orglett.9b02432

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  • High-throughput screening of bioactive compounds via new catalytic reaction in the pooled mixture Reviewed

    Ayano Satoh, Yuta Nishina

    BIOORGANIC & MEDICINAL CHEMISTRY LETTERS   29 ( 19 )   2019.10

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    DOI： 10.1016/j.bmcl.2019.06.061

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  • Electrosynthesis of Pyrenediones on Carbon Nanotube Electrodes for Efficient Electron Transfer with FAD-dependent Glucose Dehydrogenase in Biofuel Cell Anodes

    Pierre-Yves Blanchard, Paulo Henrique M. Buzzetti, Bridget Davies, Yannig Nedellec, Emerson Marcelo Girotto, Andrew J. Gross, Alan Le Goff, Yuta Nishina, Serge Cosnier, Michael Holzinger

    CHEMELECTROCHEM   6 ( 20 )   5242 - 5247   2019.10

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    DOI： 10.1002/celc.201901666

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  • Selective Reduction Mechanism of Graphene Oxide Driven by the Photon Mode versus the Thermal Mode. Reviewed International journal

    Masaki Hada, Kiyoshi Miyata, Satoshi Ohmura, Yusuke Arashida, Kohei Ichiyanagi, Ikufumi Katayama, Takayuki Suzuki, Wang Chen, Shota Mizote, Takayoshi Sawa, Takayoshi Yokoya, Toshio Seki, Jiro Matsuo, Tomoharu Tokunaga, Chihiro Itoh, Kenji Tsuruta, Ryo Fukaya, Shunsuke Nozawa, Shin-Ichi Adachi, Jun Takeda, Ken Onda, Shin-Ya Koshihara, Yasuhiko Hayashi, Yuta Nishina

    ACS nano   13 ( 9 )   10103 - 10112   2019.9

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    DOI： 10.1021/acsnano.9b03060

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  • A Biodegradable Multifunctional Graphene Oxide Platform for Targeted Cancer Therapy Reviewed

    Martin Cristina, Ruiz Amalia, Keshavan Sandeep, Reina Giacomo, Murera Diane, Nishina Yuta, Fadeel Bengt, Bianco Alberto

    ADVANCED FUNCTIONAL MATERIALS   29 ( 39 )   2019.9

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    DOI： 10.1002/adfm.201901761

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  • Ir-Catalyzed Reduction of Carbonyl Compounds Using Biogenetic Alcohols

    Yuta Nishina

    INORGANICS   7 ( 9 )   2019.9

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    DOI： 10.3390/inorganics7090114

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  • Polymer-Brush-Decorated Graphene Oxide: Precision Synthesis and Liquid-Crystal Formation Reviewed

    Ohno Kohji, Zhao Chenzhou, Nishina Yuta

    LANGMUIR   35 ( 33 )   10900 - 10909   2019.8

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  • Influence of pressure of nitrogen gas on structure and thermoelectric properties of acid-treated PEDOT:PSS films Reviewed

    May Thu Zar Myint, Hirotaka Inoue, Susumu Ichimura, Takeshi Nishikawa, Yuta Nishina, Aung Ko Ko Kyaw, Yasuhiko Hayashi

    Journal of Materials Science: Materials in Electronics   30 ( 14 )   13534 - 13542   2019.7

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    DOI： 10.1007/s10854-019-01721-2

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  • Bipolar anodic electrochemical exfoliation of graphite powders Reviewed

    Hideki Hashimoto, Yusuke Muramatsu, Yuta Nishina, Hidetaka Asoh

    Electrochemistry Communications   104   2019.7

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    DOI： 10.1016/j.elecom.2019.06.001

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  • Force-driven reversible liquid-gas phase transition mediated by elastic nanosponges Reviewed

    Nomura, Keita, Nishihara, Hirotomo, Yamamoto, Masanori, Gabe, Atsushi, Ito, Masashi, Uchimura, Masanobu, Nishina, Yuta, Tanaka, Hideki, Miyahara, Minoru T., Kyotani, Takashi

    NATURE COMMUNICATIONS   10 ( 1 )   2019.6

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    DOI： 10.1038/s41467-019-10511-7

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  • "Ultramixing": A Simple and Effective Method To Obtain Controlled and Stable Dispersions of Graphene Oxide in Cell Culture Media Reviewed

    Giacomo Reina, Amalia Ruiz, Diane Murera, Yuta Nishina, Alberto Bianco

    ACS APPLIED MATERIALS & INTERFACES   11 ( 8 )   7695 - 7702   2019.2

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    DOI： 10.1021/acsami.8b18304

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  • Electrical conductivity and optical bandgap of carbonized cellulose nanofiber papers

    D. Fukushima, K. Nagashima, T. Takahashi, T. Yanagida, Y. Nishina, K. Uetani, M. Nogi, H. Koga

    2019.1

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  • Excitation density dependence of the photoreduction on graphene oxides by single-shot transient absorption spectroscopy

    Arashida Y., Motoyama T., Ishihara M., Sawa T., Hada M., Nishina Y., Katayama I., Takeda J.

    Meeting Abstracts of the Physical Society of Japan   74.1   1645 - 1645   2019

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    DOI： 10.11316/jpsgaiyo.74.1.0_1645

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  • Chemical functionalization of graphitic nanocarbons

    Nishina, Y.

    Molecular Technology: Materials Innovation   2019

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    DOI： 10.1002/9783527823987.vol4_c2

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  • Tribological properties of oxidized wood-derived nanocarbons with same surface chemical composition as graphene oxide for additives in water-based lubricants Reviewed

    Kinoshita Hiroshi, Suzuki Kyoko, Suzuki Tsutomu, Nishina Yuta

    DIAMOND AND RELATED MATERIALS   90   101 - 108   2018.11

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    DOI： 10.1016/j.diamond.2018.09.026

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  • Specific growth inhibitors of Ralstonia solanacearum, Xanthomonas oryzae pv. oryzae, X. campestris pv. campestris, and Clavibacter michiganensis subsp. michiganensis Reviewed

    Geofrey Sing'ombe Ombiro, Taku Sawai, Yoshiteru Noutoshi, Yuta Nishina, Hidenori Matsui, Mikihiro Yamamoto, Kazuhiro Toyoda, Yuki Ichinose

    Microbiological Research   215   29 - 35   2018.10

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    DOI： 10.1016/j.micres.2018.06.005

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  • Photoreduction dynamics of graphene oxides by single-shot transient absorption spectroscopy

    Arashida Yusuke, Ishihara Masaki, Suzuki Takayuki, Motoyama Tatsuhiro, Sawa Takayoshi, Mizote Shota, Hada Masaki, Nishina Yuta, Katayama Ikufumi, Takeda Jun

    JSAP Annual Meetings Extended Abstracts   2018.2   747 - 747   2018.9

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  • Investigation of active sites for C-H functionalization on carbon-based catalyst: Effect of nitrogen-containing functional groups and radicals Reviewed

    Ahmad Muhammad Sohail, Suzuki Hideyuki, Wang Chen, Zhao Min, Nishina Yuta

    JOURNAL OF CATALYSIS   365   344 - 350   2018.9

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    DOI： 10.1016/j.jcat.2018.07.013

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  • New insertion support device assisted the accurate placement of tunneled cuffed catheter: First experience of 10 cases

    Toshiaki Ohara, Kazufumi Sakurama, Satoshi Hiramatsu, Toshimasa Karai, Toshiaki Sato, Yuta Nishina

    JOURNAL OF VASCULAR ACCESS   19 ( 5 )   501 - 505   2018.9

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    DOI： 10.1177/1129729818771884

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  • A facile synthesis of a SnO2/Graphene oxide nano-nano composite and its photoreactivity Reviewed

    Tomoyuki Tajima, Haruko Goto, Masayasu Nishi, Takahiro Ohkubo, Yuta Nishina, Hideaki Miyake, Yutaka Takaguchi

    Materials Chemistry and Physics   212   149 - 154   2018.6

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    DOI： 10.1016/j.matchemphys.2018.03.046

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  • Graphene oxide size and oxidation degree govern its supramolecular interactions with siRNA Reviewed

    Giacomo Reina, Ngoc Do Quyen Chau, Yuta Nishina, Alberto Bianco

    NANOSCALE   10 ( 13 )   5965 - 5974   2018.4

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    DOI： 10.1039/c8nr00333e

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  • Simultaneous improvement in electrical conductivity and Seebeck coefficient of PEDOT:PSS by N-2 pressure-induced nitric acid treatment Reviewed

    May Thu Zar Myint, Masaki Hada, Hirotaka Inoue, Tatsuki Marui, Takeshi Nishikawa, Yuta Nishina, Susumu Ichimura, Masayoshi Umeno, Aung Ko Ko Kyaw, Yasuhiko Hayashi

    RSC ADVANCES   8 ( 64 )   36563 - 36570   2018

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    DOI： 10.1039/c8ra06094k

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  • Metaheuristic Ab Initio Optimum Search for Doping Effects in Nanocarbons Reviewed

    Tsuruta Kenji, Mitani Keiichi, Al Asad, Md. Abdullah, Nishina Yuta, Gotoh Kazuma, Ishikawa Atsushi

    THERMEC 2018: 10TH INTERNATIONAL CONFERENCE ON PROCESSING AND MANUFACTURING OF ADVANCED MATERIALS   941   2356 - 2359   2018

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    DOI： 10.4028/www.scientific.net/MSF.941.2356

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  • Chemical functionalization of graphitic nanocarbons

    Nishina, Y.

    Molecular Technology: Energy Innovation   4-4   2018

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    DOI： 10.1002/9783527823987.vol4_c2

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  • Elucidation of siRNA complexation efficiency by graphene oxide and reduced graphene oxide Reviewed

    Ngoc Do Quyen Chau, Giacomo Reina, Jesus Raya, Isabella Anna Vacchi, Cecilia Menard-Moyon, Yuta Nishina, Alberto Bianco

    CARBON   122   643 - 652   2017.10

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    DOI： 10.1016/j.carbon.2017.07.016

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  • Effects of preparation method on the properties of cobalt supported beta-zeolite catalysts for Fischer-Tropsch synthesis Reviewed

    Manami Nakanishi, Md. Azhar Uddin, Yoshiei Kato, Yuta Nishina, Abdul Muaz Hapipi

    CATALYSIS TODAY   291   124 - 132   2017.8

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    DOI： 10.1016/j.cattod.2017.01.017

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  • Carbocatalytic reductive coupling reactions via electron transfer from graphene to aryldiazonium salt Reviewed

    Naoki Morimoto, Kumika Morioku, Hideyuki Suzuki, Yumi Nakai, Yuta Nishina

    CHEMICAL COMMUNICATIONS   53 ( 53 )   7226 - 7229   2017.7

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    DOI： 10.1039/c7cc02337e

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  • Renewable Wood Pulp Paper Reactor with Hierarchical Micro/Nanopores for Continuous-Flow Nanocatalysis Reviewed

    Hirotaka Koga, Naoko Namba, Tsukasa Takahashi, Masaya Nogi, Yuta Nishina

    CHEMSUSCHEM   10 ( 12 )   2560 - 2565   2017.6

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    DOI： 10.1002/cssc.201700576

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  • Surfactant modified graphene oxide laminates for filtration Reviewed

    B. Lian, J. Deng, G. Leslie, H. Bustamante, V. Sahajwalla, Y. Nishina, R. K. Joshi

    Carbon   116   240 - 245   2017.5

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    DOI： 10.1016/j.carbon.2017.01.102

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  • Real-Time, in Situ Monitoring of the Oxidation of Graphite: Lessons Learned Reviewed

    Naoki Morimoto, Hideyuki Suzuki, Yasuo Takeuchi, Shogo Kawaguchi, Masahiro Kunisu, Christopher W. Bielawski, Yuta Nishina

    CHEMISTRY OF MATERIALS   29 ( 5 )   2150 - 2156   2017.3

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    DOI： 10.1021/acs.chemmater.6b04807

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  • SWCNT Photocatalyst for Hydrogen Production from Water upon Photoexcitation of (8,3) SWCNT at 680-nm Light Reviewed

    Noritake Murakami, Yuto Tango, Hideaki Miyake, Tomoyuki Tajima, Yuta Nishina, Wataru Kurashige, Yuichi Negishi, Yutaka Takaguchi

    SCIENTIFIC REPORTS   7   2017.3

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    DOI： 10.1038/srep43445

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  • Nucleophilic fluoroalkylation/cyclization route to fluorinated phthalides Reviewed

    Masanori Inaba, Tatsuya Sakai, Shun Shinada, Tsuyuka Sugiishi, Yuta Nishina, Norio Shibata, Hideki Amii

    Beilstein Journal of Organic Chemistry   14   182 - 186   2017.1

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    DOI： 10.3762/bjoc.14.12

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  • Preparation of Manganese/Graphite Oxide Composite Using Permanganate and Graphite: Application as Catalyst in Bromination of Hydrocarbons Reviewed

    Hideyuki Suzuki, Yuta Nishina

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   90 ( 1 )   74 - 78   2017.1

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    DOI： 10.1246/bcsj.20160346

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  • Chemical surface modification of graphene oxide by femtosecond laser pulse irradiation in aqueous suspensions Reviewed

    Muttaqin, Takahiro Nakamura, Yuta Nishina, Shunichi Sato

    JOURNAL OF MATERIALS SCIENCE   52 ( 2 )   749 - 759   2017.1

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    DOI： 10.1007/s10853-016-0368-8

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  • Use of aqueous extract of Pseuderanthemum acuminatissimum Radlk leaves to mediate the synthesis of gold nanoparticles and their anti eschericia coli activity Reviewed

    S. Salprima Yudha, Totok Eka Suharto, Eka Angasa, Yuta Nishina, Zulfikri Achid Mardlia, Sipriyadi

    Oriental Journal of Chemistry   32 ( 2 )   745 - 751   2017

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    DOI： 10.13005/ojc/330221

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  • Tuning the redox potential of Vitamin K3 derivatives by oxidative functionalization using a Ag(i)/GO catalyst Reviewed

    S. I. El-Hout, H. Suzuki, S. M. El-Sheikh, H. M.A. Hassan, F. A. Harraz, I. A. Ibrahim, E. A. El-Sharkawy, S. Tsujimura, M. Holzinger, Y. Nishina

    Chemical Communications   53 ( 63 )   8890 - 8893   2017

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    DOI： 10.1039/c7cc03910g

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  • Formation and Characterization of Copper Nanocube-Decorated Reduced Graphene Oxide Film

    Khan, M.Z.H., Rahman, M.A., Yasmin, P., Tareq, F.K., Yuta, N., Komeda, T., Jahan, R.A.

    Journal of Nanomaterials   2017   2017

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    DOI： 10.1155/2017/5702838

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  • Deposition of an Ultraflat Graphene Oxide Nanosheet on Atomically Flat Substrates

    Khan, M.Z.H., Shahed, S.M.F., Yuta, N., Komeda, T.

    Journal of Electronic Materials   46 ( 7 )   2017

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  • ChemInform Abstract: Synthesis of 2-Arylphenol Derivatives Through a One-Pot Suzuki-Miyaura Coupling/Dehydrogenative Aromatization Sequence with Pd/C Catalysis

    Kotaro Kikushima, Yuta Nishina

    ChemInform   47 ( 2 )   2016.7

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    DOI： 10.1002/chin.201602087

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  • Dependence of ph level on tribological effect of graphene oxide as an additive in water lubrication Reviewed

    A. A. Alias, H. Kinoshita, Y. Nishina, M. Fujii

    International Journal of Automotive and Mechanical Engineering   13 ( 1 )   3150 - 3156   2016.6

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    DOI： 10.15282/ijame.13.1.2016.2.0262

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  • Concurrent Formation of Carbon-Carbon Bonds and Functionalized Graphene by Oxidative Carbon-Hydrogen Coupling Reaction Reviewed

    Kumika Morioku, Naoki Morimoto, Yasuo Takeuchi, Yuta Nishina

    SCIENTIFIC REPORTS   6   2016.5

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    DOI： 10.1038/srep25824

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  • Lewis Acid and Fluoroalcohol Mediated Nucleophilic Addition to the C2 Position of Indoles Reviewed

    Naoki Morimoto, Kumika Morioku, Hideyuki Suzuk, Yasuo Takeuchi, Yuta Nishina

    ORGANIC LETTERS   18 ( 9 )   2020 - 2023   2016.5

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  • Tailoring the Oxygen Content of Graphite and Reduced Graphene Oxide for Specific Applications Reviewed

    Naoki Morimoto, Takuya Kubo, Yuta Nishina

    SCIENTIFIC REPORTS   6   2016.2

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    DOI： 10.1038/srep21715

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  • Hydrosilane-Assisted Formation of Metal Nanoparticles on Graphene Oxide Reviewed

    Akinori Saito, Hiroshi Kinoshita, Ken-ichi Shimizu, Yuta Nishina

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   89 ( 1 )   67 - 73   2016.1

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    DOI： 10.1246/bcsj.20150331

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  • Carbon-catalyzed Dehydrogenation of Indolines: Detection of Active Intermediate and Exploration of High-performance Catalyst Reviewed

    Naoki Morimoto, Yasuo Takeuchi, Yuta Nishina

    CHEMISTRY LETTERS   45 ( 1 )   21 - 23   2016.1

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    DOI： 10.1246/cl.150905

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  • Oxidation and reduction of graphitic materials for physical and chemical property control

    Nishina Yuta

    TANSO   2016 ( 271 )   15 - 24   2016

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    Oxidation of graphite produces graphite oxide and/or graphene oxide, both of which are abbreviated "GO". The preparation methods of these materials have been described by Brodie, Staudenmaier, and Hummers. Graphene oxide is widely recognized as a promising material in various fields, but its structure and composition has still not been fully controlled. In this article, general strategies to control the structure, particle size, and oxidation degree of graphene-like materials are introduced with emphasis on the oxidation of graphite by KMnO4 in H2SO4 (oGO) and the reduction of highly oxidized graphene oxide by hydrazine (rGO). Even though the oxygen content is the same, oGO and rGO have different properties, such as adsorption ability, oxidation ability, and electronic conductivity, because of differences in the persisting graphitic structure and defects. These results can be used as a guideline for the production of tailor-made GO. The current method of GO preparation is also discussed.

    DOI： 10.7209/tanso.2016.15

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  • Fast, scalable, and eco-friendly fabrication of an energy storage paper electrode Reviewed

    Hirotaka Koga, Hidetsugu Tonomura, Masaya Nogi, Katsuaki Suganuma, Yuta Nishina

    GREEN CHEMISTRY   18 ( 4 )   1117 - 1124   2016

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    DOI： 10.1039/c5gc01949d

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  • Investigations on tribological mechanisms of graphene oxide and oxidized wood-derived nanocarbons as water-based lubricating additives Reviewed

    Hiroshi Kinoshita, Yuta Nishina

    Tribology Online   11 ( 2 )   235 - 241   2016

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    DOI： 10.2474/trol.11.235

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  • The Scaevola frutescen (Mill.) Krause Dried-Leaves Extract as a Potential Natural Reduction System for Synthesis of Gold Nanoparticles and Their Evaluation for Antibacterial of Eschericia coli Reviewed

    Salprima S. Yudha, Eka Angasa, Totok Eka Suharto, Yuta Nishina, Zulfikri Achid Mardlia, Sipriyadi

    6TH NANOSCIENCE AND NANOTECHNOLOGY SYMPOSIUM (NNS2015)   1710   2016

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    DOI： 10.1063/1.4941483

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  • Photoinduced Structural Dynamics from sp3 to sp2 Hybridization in Graphene Oxide

    Hada Masaki, Nishina Yuta, Hayashi Yasuhiko, Tokunaga Tomoharu, Koshihara Shin-ya, Ichiyanagi Kohei, Nozawa Shunsuke, Adachi Shin'ichi, Katayama Ikufumi, Suzuki Takayuki, Minami Yasuo, Takeda Jun

    Meeting Abstracts of the Physical Society of Japan   71   1279 - 1279   2016

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    DOI： 10.11316/jpsgaiyo.71.2.0_1279

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  • Preparation of graphene oxide and its metal composite materials as catalysts for organic reactions

    Nishina, Y., Morimoto, N.

    Graphene Science Handbook   2-6   2016

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  • Synthesis of 2-Arylphenol Derivatives through a One-Pot Suzuki-Miyaura Coupling/Dehydrogenative Aromatization Sequence with Pd/C Catalysis Reviewed

    Kotaro Kikushima, Yuta Nishina

    EUROPEAN JOURNAL OF ORGANIC CHEMISTRY   2015 ( 26 )   5864 - 5868   2015.9

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    DOI： 10.1002/ejoc.201500723

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  • Metal free C-H coupling of aromatic compounds by graphene oxide activated by acidic additives Reviewed

    Nishina Yuta, Morimoto Naoki, Morioku Kumika

    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY   250   2015.8

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  • Production of Gold Nanoparticles (AuNPs) from Chloroaurate Ions Using Aqueous Extract Of Air-Dried Premna obtusifulia Leaves Reviewed

    Yudha Salprima S, Angasa Eka, Suharto Totok Eka, Nishina Yuta, Mardlia Zulfikri Achid

    RESEARCH JOURNAL OF PHARMACEUTICAL BIOLOGICAL AND CHEMICAL SCIENCES   6 ( 4 )   1802 - 1806   2015.7

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  • Tribological properties of graphene oxide as a lubricating additive in water and lubricating oils Reviewed

    Kinoshita Hiroshi, Ono Hideki, Alias Aidil Azli, Nishina Yuta, Fujii Masahiro

    MECHANICAL ENGINEERING JOURNAL   2 ( 6 )   2015

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    DOI： 10.1299/mej.15-00323

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  • Highly durable carbon-supported Pt catalysts prepared by hydrosilane-assisted nanoparticle deposition and surface functionalization Reviewed

    Akinori Saito, Hiromi Tsuji, Iwao Shimoyama, Ken-ichi Shimizu, Yuta Nishina

    CHEMICAL COMMUNICATIONS   51 ( 27 )   5883 - 5886   2015

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    DOI： 10.1039/c4cc10298c

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  • Facile identification of the critical content of multi-layer graphene oxide for epoxy composite with optimal thermal properties Reviewed

    Tianle Zhou, Shijo Nagao, Tohru Sugahara, Hirotaka Koga, Masaya Nogi, Katsuaki Suganuma, Thi Thi Nge, Yuta Nishina

    RSC ADVANCES   5 ( 26 )   20376 - 20385   2015

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    DOI： 10.1039/c4ra15881d

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  • Targeted kinetic strategy for improving the thermal conductivity of epoxy composite containing percolating multi-layer graphene oxide chains Reviewed

    Zhou, T., Koga, H., Nogi, M., Sugahara, T., Nagao, S., Nge, T.T., Suganuma, K., Cui, H.-W., Liu, F., Nishina, Y.

    Express Polymer Letters   9 ( 7 )   608 - 623   2015

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    DOI： 10.3144/expresspolymlett.2015.57

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  • Polycyclic N-Heterocyclic Compounds 76: Synthesis and Antiplatelet Evaluation of 2,4-Disubstituted 5,6-Dihydro[1]benzofuro[3',2':2,3]oxepino[4,5-d]pyrimidines Reviewed

    Kensuke Okuda, Jun-ichi Takano, Takashi Hirota, Kenji Sasaki, Yuta Nishina, Hiroyuki Ishida

    JOURNAL OF HETEROCYCLIC CHEMISTRY   51 ( 3 )   661 - 668   2014.5

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    DOI： 10.1002/jhet.1539

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  • Tribological properties of monolayer graphene oxide sheets as water-based lubricant additives Reviewed

    Hiroshi Kinoshita, Yuta Nishina, Aidil Azli Alias, Masahiro Fujii

    CARBON   66   720 - 723   2014.1

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    DOI： 10.1016/j.carbon.2013.08.045

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  • Facile preparation of Pd nanoparticles supported on single-layer graphene oxide and application for the Suzuki-Miyaura cross-coupling reaction Reviewed

    Shun-ichi Yamamoto, Hiroshi Kinoshita, Hideki Hashimoto, Yuta Nishina

    NANOSCALE   6 ( 12 )   6501 - 6505   2014

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    DOI： 10.1039/c4nr00715h

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  • Fine tuning of the sheet distance of graphene oxide that affects the activity and substrate selectivity of a Pd/graphene oxide catalyst in the Heck reaction Reviewed

    Akinori Saito, Shun-Ichi Yamamoto, Yuta Nishina

    RSC Advances   4 ( 104 )   59835 - 59838   2014

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    DOI： 10.1039/c4ra10512e

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  • Application of Heterogeneous Catalysts for Organic Synthesis by Controlling the Oxidation State of Metal Species Reviewed

    Yuta Nishina

    JOURNAL OF SYNTHETIC ORGANIC CHEMISTRY JAPAN   71 ( 12 )   1307 - 1308   2013.12

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  • Nanocrystalline magnesium oxide-stabilized palladium(0): The Heck reaction of heteroaryl bromides in the absence of additional ligands and base Reviewed

    Mannepalli Lakshmi Kantam, Police Vishnuvardhan Redddy, Pottabathula Srinivas, Akula Venugopal, Suresh Bhargava, Yuta Nishina

    Catalysis Science and Technology   3 ( 10 )   2550 - 2554   2013.10

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    DOI： 10.1039/c3cy00404j

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  • Bromination of hydrocarbons with CBr4, initiated by light-emitting diode irradiation Reviewed

    Yuta Nishina, Bunsho Ohtani, Kotaro Kikushima

    BEILSTEIN JOURNAL OF ORGANIC CHEMISTRY   9   1663 - 1667   2013.8

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    DOI： 10.3762/bjoc.9.190

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  • Green synthesis of silver nanoparticles using aqueous rinds extract of Brucea javanica (L.) Merr at ambient temperature Reviewed

    Salprima S. Yudha, Doni Notriawan, Eka Angasa, Totok Eka Suharto, John Hendri, Yuta Nishina

    MATERIALS LETTERS   97   181 - 183   2013.4

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    DOI： 10.1016/j.matlet.2013.01.114

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  • Ionic amino acids: Application as organocatalysts in the aza-Michael reaction Reviewed

    Naoki Morimoto, Yasuo Takeuchi, Yuta Nishina

    JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL   368   31 - 37   2013.3

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    DOI： 10.1016/j.molcata.2012.11.012

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  • Copper-catalyzed oxidative aromatization of 2-cyclohexen-1-ones to phenols in the presence of catalytic hydrogen bromide under molecular oxygen Reviewed

    Kotaro Kikushima, Yuta Nishina

    RSC ADVANCES   3 ( 43 )   20150 - 20156   2013

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    DOI： 10.1039/c3ra43071e

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  • Palladium on graphene: the in situ generation of a catalyst for the chemoselective reduction of alpha,beta-unsaturated carbonyl compounds Reviewed

    Naoki Morimoto, Shun-ichi Yamamoto, Yasuo Takeuchi, Yuta Nishina

    RSC ADVANCES   3 ( 36 )   15608 - 15612   2013

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    DOI： 10.1039/c3ra42150c

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  • Direct bromination of hydrocarbons catalyzed by Li2MnO3 under oxygen and photo-irradiation conditions Reviewed

    Yuta Nishina, Junya Morita, Bunsho Ohtani

    RSC ADVANCES   3 ( 7 )   2158 - 2162   2013

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    DOI： 10.1039/c2ra22197g

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  • Crystal and Fine Structural Transformations of Heat-Treated Biogenic Manganese Oxide Reviewed

    木村倫康, 橋本英樹, 宮田直幸, 仁科勇太, 草野圭弘, 池田靖訓, 中西真, 藤井達生, IVO Safarik, IVO Safarik, MIRKA Safarikova, 高田潤

    粉体および粉末冶金   60 ( 3 )   92-99 (J-STAGE) - 99   2013

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    Language：Japanese   Publisher：Japan Society of Powder and Powder Metallurgy  

    In the natural aquatic environment, there are various types of biogenic manganese oxide (BMO) precipitates which are produced by manganese oxidizing microorganisms, at ambient temperature, atmosphere and neutral pH.BMO is a very interesting and useful functional material because of its unique property; hollow globule shape formed by nanosheets, large surface area and photocatalytic characteristics. In this study, thermally-processed BMO at 100 − 1000 °C was analyzed by XRD, XANES, SEM, TEM and nitrogen adsorption method to reveal the effects of heat-treatment on its crystal structure, Mn valence state, globule morphology, microstructure, pore size distribution and specific surface area. In the result, morphology of BMO is maintained below 800 °C, while nanosheets composing BMO were changed into nanoparticles at 600 °C. The crystal structure was transformed from birnessite into hausmannite (Mn3O4) at 600 °C. The specific surface area was increased by heat-treatment between 300 and 500 °C. In cases of artificial manganese oxides, such changes of crystal structure and specific surface area were not observed, and combustion of organic materials produced by microorganisms in BMO probably has a large effect on them.

    DOI： 10.2497/jjspm.60.92

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  • 10'-Chloro-3′,4′-dihydro-2′H-spiro[cyclopropane-1, 7'(6′H)-pyrimido[2,1-a]isoquinolin]-6′-one Reviewed

    Kensuke Okuda, Takashi Hirota, Yuta Nishina, Hiroyuki Ishida

    Acta Crystallographica Section E: Structure Reports Online   68 ( 11 )   o3252 - +   2012.11

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    DOI： 10.1107/S1600536812044261

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  • 3-(2-Oxo-2,3,4,5-tetrahydrofuran-3-yl)-1-benzofuran-2-carbonitrile Reviewed

    Kensuke Okuda, Takashi Hirota, Yuta Nishina, Hiroyuki Ishida

    Acta Crystallographica Section E: Structure Reports Online   68 ( 9 )   o2819 - +   2012.9

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    DOI： 10.1107/S1600536812036835

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  • Novel Plant Immune-Priming Compounds Identified via High-Throughput Chemical Screening Target Salicylic Acid Glucosyltransferases in Arabidopsis Reviewed

    Yoshiteru Noutoshi, Masateru Okazaki, Tatsuya Kida, Yuta Nishina, Yoshihiko Morishita, Takumi Ogawa, Hideyuki Suzuki, Daisuke Shibata, Yusuke Jikumaru, Atsushi Hanada, Yuji Kamiya, Ken Shirasu

    PLANT CELL   24 ( 9 )   3795 - 3804   2012.9

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    DOI： 10.1105/tpc.112.098343

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  • Characterization of hybrid composite membrane based polymer/precursor/SiO2 Reviewed

    Uma Thanganathan, Yuta Nishina, Kunio Kimura, Satoshi Hayakawa, Rambabu Bobba

    MATERIALS LETTERS   81   88 - 91   2012.8

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    DOI： 10.1016/j.matlet.2012.04.023

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  • Hydrothiolation and Intramolecular Cyclization Sequence for the Synthesis of 1,3-Oxathiine Frameworks Reviewed

    Yuta Nishina, Junya Miyata

    SYNTHESIS-STUTTGART   44 ( 16 )   2607 - 2613   2012.8

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1055/s-0032-1316563

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  • Arrangement and Dispersion of Rh and Pt Atoms on Graphene Oxide Sheets Reviewed

    Kazuma Gotoh, Hideki Hashimoto, Ryo Kawai, Yuta Nishina, Eiji Fujii, Takahiro Ohkubo, Atsushi Itadani, Yasushige Kuroda, Hiroyuki Ishida

    CHEMISTRY LETTERS   41 ( 7 )   680 - 682   2012.7

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    DOI： 10.1246/cl.2012.680

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  • Ruthenium/magnesium-lanthanum mixed oxide: An efficient reusable catalyst for oxidation of alcohols by using molecular oxygen Reviewed

    M. Lakshmi Kantam, R. Sudarshan Reddy, Ujjwal Pal, M. Sudhakar, A. Venugopal, K. Jeeva Ratnam, F. Figueras, Venkat Reddy Chintareddy, Yuta Nishina

    JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL   359   1 - 7   2012.7

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    DOI： 10.1016/j.molcata.2012.03.013

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  • Catalytic guanylation of aliphatic, aromatic, heterocyclic primary and secondary amines using nanocrystalline zinc(II) oxide Reviewed

    M. Lakshmi Kantam, S. Priyadarshini, P. J. Amal Joseph, P. Srinivas, A. Vinu, K. J. Klabunde, Yuta Nishina

    TETRAHEDRON   68 ( 29 )   5730 - 5737   2012.7

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    DOI： 10.1016/j.tet.2012.05.044

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  • 酸化薄片化黒鉛及びその製造方法 Reviewed

    仁科勇太

    特願2012-083453，岡山大学   2012

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  • Recyclable Pd-graphene catalyst: mechanistic insights into heterogeneous and homogeneous catalysis Reviewed

    Yuta Nishina, Junya Miyata, Ryo Kawai, Kazuma Gotoh

    RSC ADVANCES   2 ( 25 )   9380 - 9382   2012

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    DOI： 10.1039/c2ra21185h

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  • Bromination of aromatic compounds using an Fe2O3/zeolite catalyst Reviewed

    Yuta Nishina, Keishi Takami

    GREEN CHEMISTRY   14 ( 9 )   2380 - 2383   2012

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    DOI： 10.1039/c2gc35821b

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  • Biogenic manganese oxide: effective new catalyst for direct bromination of hydrocarbons Reviewed

    Yuta Nishina, Hideki Hashimoto, Noriyasu Kimura, Naoyuki Miyata, Tatsuo Fujii, Bunsho Ohtani, Jun Takada

    RSC ADVANCES   2 ( 16 )   6420 - 6423   2012

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c2ra20896b

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  • 炭化水素の酸化触媒および炭化水素酸化物の製造方法 Reviewed

    仁科勇太

    特願2012-029061，岡山大学   2012

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  • 臭素化触媒及びその製造方法 Reviewed

    仁科勇太

    特願2011-263954，岡山大学   2011.12

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  • Synthesis of Multisubstituted Cyclopentadienes from Cyclopentenones Prepared via Catalytic Double Aldol Condensation and Nazarov Reaction Sequence Reviewed

    Yuta Nishina, Tomohiro Tatsuzaki, Ayano Tsubakihara, Yoichiro Kuninobu, Kazuhiko Takai

    SYNLETT   17 ( 17 )   2585 - 2589   2011.10

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    DOI： 10.1055/s-0030-1260324

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  • ハロゲン化触媒及びハロゲン化合物の製造方法 Reviewed

    仁科勇太

    PCT/JP2011/74795，岡山大学   2011.10

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  • Facile Sc(OTf)(3)-Catalyzed Generation and Successive Aromatization of Isobenzofuran from o-Dicarbonylbenzenes Reviewed

    Yuta Nishina, Tatsuya Kida, Tomonari Ureshino

    ORGANIC LETTERS   13 ( 15 )   3960 - 3963   2011.8

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    DOI： 10.1021/ol201479p

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  • ハロゲン化触媒およびハロゲン化合物の製造方法 Reviewed

    仁科勇太

    特願2011-008026号，岡山大学   2011.1

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  • ハロゲン化触媒及びハロゲン化合物の製造方法 Reviewed

    仁科勇太

    特願2010-288035号 岡山大学   2010.12

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  • Synthesis of Functionalized Pentacenes from Isobenzofurans Derived from C-H Bond Activation Reviewed

    Yoichiro Kuninobu, Takayuki Seiki, Shunsuke Kanamaru, Yuta Nishina, Kazuhiko Takai

    ORGANIC LETTERS   12 ( 22 )   5287 - 5289   2010.11

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    DOI： 10.1021/ol102349r

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  • Rhenium-Catalyzed Insertion of Nonpolar and Polar Unsaturated Molecules into an Olefinic C-H Bond Reviewed

    Yoichiro Kuninobu, Yasuo Fujii, Takashi Matsuki, Yuta Nishina, Kazuhiko Takai

    ORGANIC LETTERS   11 ( 12 )   2711 - 2714   2009.6

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    DOI： 10.1021/ol900962v

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  • Reactions and Mechanistic Studies of Rhenium-Catalyzed Insertion of alpha,beta-Unsaturated Carbonyl Compounds into a C-H Bond Reviewed

    Yoichiro Kuninobu, Yuta Nishina, Kayo Okaguchi, Makoto Shouho, Kazuhiko Takai

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   81 ( 11 )   1393 - 1401   2008.11

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/bcsj.81.1393

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  • Synthesis of Cp-Re Complexes via Olefinic C-H Activation and Successive Formation of Cyclopentadienes Reviewed

    Yoichiro Kuninobu, Yuta Nishina, Takashi Matsuki, Kazuhiko Takai

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   130 ( 43 )   14062 - +   2008.10

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    DOI： 10.1021/ja805921f

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  • Hydroarylation of acetylenes, acrylates, and isocyanates with heteroaromatic compounds under rhenium catalysis Reviewed

    Yoichiro Kuninobu, Kou Kikuchi, Yukimi Tokunaga, Yuta Nishina, Kazuhiko Takai

    TETRAHEDRON   64 ( 26 )   5974 - 5981   2008.6

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    DOI： 10.1016/j.tet.2008.01.145

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  • Rhenium-catalyzed synthesis of indene derivatives via C-H bond activation Reviewed

    Yoichiro Kuninobu, Yuta Nishina, Atsushi Kawata, Makoto Shouho, Kazuhiko Takai

    PURE AND APPLIED CHEMISTRY   80 ( 5 )   1149 - 1154   2008.5

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1351/pac200880051149

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  • Rhenium-catalyzed synthesis of naphthalene derivatives via insertion of aldehydes into a C-H bond Reviewed

    Yoichiro Kuninobu, Yuta Nishina, Kazuhiko Takai

    TETRAHEDRON   63 ( 35 )   8463 - 8468   2007.8

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.tet.2007.05.083

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  • Manganese-catalyzed insertion of aldehydes into a C-H bond Reviewed

    Yoichiro Kuninobu, Yuta Nishina, Takahiro Takeuchi, Kazuhiko Takai

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   46 ( 34 )   6518 - 6520   2007

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/ani3.200702256

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  • From Newcomer

    Nishina Y.

    TANSO   2017 ( 279 )   156 - 156   2007

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    Language：Japanese   Publisher：THE CARBON SOCIETY OF JAPAN  

    DOI： 10.7209/tanso.2017.156

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  • Rhenium-catalyzed insertion of aldehyde into a C-H bond: Synthesis of isobenzofuran derivatives Reviewed

    Yoichiro Kuninobu, Yuta Nishina, Chie Nakagawa, Kazuhiko Takai

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   128 ( 38 )   12376 - 12377   2006.9

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    DOI： 10.1021/ja065643e

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  • Sequential ruthenium-catalyzed hydroamination and rhenium-catalyzed C-H bond activation leading to indene derivatives Reviewed

    Yoichiro Kuninobu, Yuta Nishina, Kazuhiko Takai

    ORGANIC LETTERS   8 ( 13 )   2891 - 2893   2006.6

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    DOI： 10.1021/ol0611292

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  • Rhenium- and aniline-catalyzed one-pot annulation of aromatic ketones and alpha,beta-unsaturated esters initiated by C-H bond activation Reviewed

    Y Kuninobu, Y Nishina, M Shoitho, K Takai

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   45 ( 17 )   2766 - 2768   2006

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    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.200503627

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Books

  • Engineering Materials for Stem Cell Regeneration

    Mohammed Zahedul, Islam Nizami, Yuta Nishina（ Role： Joint author ,  Recent Advances in Stem Cells for Dental Tissue Engineering）

    Springer  2021.9 

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  • グラフェンから広がる二次元物質の新技術と応用―世界の動向、CVD合成、転写積層、量子物性、センサ・デバイス、THz応用

    仁科勇太, 小幡誠司（ Role： Contributor ,  酸化グラフェンの合成と還元）

    エヌティーエス  2020.3  （ ISBN:4860436636 ）

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  • Molecular Technology: Synthesis Innovation

    Yuta Nishina（ Role： Contributor ,  Chemical functionalization of graphitic nanocarbon）

    2019.8 

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  • Molecular Technology: Energy Innovation

    Yuta Nishina（ Role： Contributor ,  Molecular Design of Glucose Biofuel Cell Electrodes）

    Wiley-VCH  2018.10 

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  • Nanocarbons for Energy Conversion

    Yuta Nishina（Improved synthesis of graphene-like materials and their application）

    Springer  2018.8 

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  • 炭素材料の研究開発動向2018

    仁科勇太（ Role： Contributor ,  ナノカーボンの作製・機能創出・利用）

    CPC研究会  2018.6 

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  • 電気化学・インピーダンス測定のデータ解析手法と事例集

    仁科勇太（ Role： Contributor ,  グラフェンを負極材に利用したリチウムイオン電池の評価事例）

    技術情報協会  2018.1 

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  • 高耐熱・高放熱部材の性能向上と熱対策技術

    仁科勇太（ Role： Contributor ,  グラフェン類と高分子の複合体の調製法と熱伝導性材料への応用）

    技術情報協会  2017.1 

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  • カーボンナノチューブ・グラフェンの応用研究最前線

    仁科勇太（ Role： Contributor ,  酸化グラフェンの大量合成）

    エヌティーエス  2016.9 

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  • 酸化グラフェンの機能と応用

    仁科勇太（ Role： Contributor ,  酸化グラフェンの合成）

    シーエムシー出版  2016.4 

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  • GRAPHENE SCIENCE HANDBOOK

    Yuta Nishina, Naoki Morimoto（ Role： Contributor ,  Facile Preparation of Graphene Oxide and Its Metal Composite Materials toward Application for Catalysts in Organic Reactions）

    Taylor & Francis  2016.4 

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  • グラフェン・コンポジット

    仁科勇太（ Role： Contributor ,  酸化グラフェンの合成方法とサイズ・酸化度の制御）

    S&T出版  2014.7 

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  • グラフェン・コンポジット

    仁科勇太, 齋藤彰範（ Role： Contributor ,  金属-酸化グラフェン複合体の作製と触媒作用）

    S&T出版  2014.7 

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  • 触媒の設計・反応制御 事例集

    仁科勇太, 菊嶌孝太郎（金属－グラフェン複合体の触媒としての応用）

    技術情報協会  2013.1 

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MISC

  • ナノセルロースの炭素化による3次元構造体の構築と絶縁体・半導体・導電体の制御

    古賀 大尚, 長島 一樹, 仁科 勇太

    木材情報   ( 377 )   15 - 19   2022.10

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  • Coordination chemistry for innovative carbon-related materials

    Ryota Sakamoto, Ryojun Toyoda, Guan Jingyan, Yuta Nishina, Kazuhide Kamiya, Hirotomo Nishihara, Tomoki Ogoshi

    Coordination Chemistry Reviews   466   2022.9

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    Language：English   Publishing type：Book review, literature introduction, etc.  

    DOI： 10.1016/j.ccr.2022.214577

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  • Covalent functionalization of carbon materials with redox-active organic molecules for energy storage

    Rizwan Khan, Yuta Nishina

    Nanoscale   13 ( 1 )   36 - 50   2021.1

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    Language：English   Publishing type：Book review, literature introduction, etc.  

    DOI： 10.1039/d0nr07500k

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  • Graphene oxide: A new direction in dentistry

    Mohammed Zahedul Islam Nizami, Shogo Takashiba, Yuta Nishina

    Applied Materials Today   19   2020.6

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  • Fusion of Nanocellulose and Electronic Materials for Green Flexible Electronics

    古賀大尚, 長島一樹, 高橋綱己, 仁科勇太

    電子情報通信学会技術研究報告   119 ( 389(OME2019 59-64) )   2020

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  • 木材ナノセルロースペーパーの炭素化と電気特性遷移

    福島大喜, 吉田由紀, 上谷幸治郎, 能木雅也, 古賀大尚, 仁科勇太, 高橋綱己, 長島一樹, 柳田剛

    日本木材学会大会研究発表要旨集(完全版)(CD-ROM)   69th   ROMBUNNO.Z14‐02‐1545   2019.3

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  • イノベーション創出を目指す異分野融合研究アライアンス 異分野融合による紙のリノベーション研究

    古賀大尚, 長島一樹, 仁科勇太

    セラミックス   53 ( 6 )   391‐394   2018.6

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  • 異分野融合による紙のリノベーション研究

    コガ ヒロタカ, ナガシマ カズキ, ニシナ ユウタ

    53 ( 6 )   391 - 394   2018.6

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  • リサイクル可能な固定化触媒ペーパーリアクターの開発

    古賀大尚, 高橋司, 能木雅也, 仁科勇太

    日本木材学会大会研究発表要旨集(完全版)(CD-ROM)   67th   ROMBUNNO.K17‐05‐1515   2017.2

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  • Can Graphene Work as a Superior Support Material in Catalysis?

    58 ( 4 )   214 - 217   2016.8

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  • ゾルゲル法を利用したSnO2グラフェンオキシドハイブリッドの合成と光触媒能

    後藤良子, 田嶋智之, 仁科勇太, 高口豊

    日本化学会春季年会講演予稿集(CD-ROM)   96th   2016

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  • Preparation Method of Metal/Graphene (Oxide) Composites and Application for Catalysts

    57 ( 6 )   328 - 333   2015.12

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  • Graphene Oxide Lubricant Additive in Water

    44 ( 2 )   8 - 15   2015.2

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  • Graphene oxide: The new membrane material

    R. K. Joshi, S. Alwarappan, M. Yoshimura, V. Sahajwalla, Y. Nishina

    Applied Materials Today   1 ( 1 )   1 - 12   2015

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    Language：English   Publishing type：Book review, literature introduction, etc.   Publisher：Elsevier Ltd  

    DOI： 10.1016/j.apmt.2015.06.002

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  • Anti-wear effect of graphene oxide in lubrication by fluorine-containing ionic liquid for steel

    Kinoshita, H., Kondo, M., Nishina, Y., Fujii, M.

    Tribology Online   10 ( 1 )   91 - 95   2015

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  • ゾルゲル法を利用した酸化スズ-グラフェンオキシドハイブリッドの合成と光機能

    後藤良子, 田嶋智之, 仁科勇太, 高口豊

    日本化学会中国四国支部大会講演要旨集   2015   2015

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  • Efficient Preparation Method of Graphene Oxide and its Structure Control

    65 ( 2 )   134 - 139   2014.2

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  • Tribological property of water dispersion of single-layered graphene oxide

    木之下博, ALIAS A.A., 仁科勇太, 藤井正浩

    日本機械学会機素潤滑設計部門講演会講演論文集   14th (Web)   2014

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  • 酸化グラフェンと酸化スズからなるマクロ孔配列の作製

    後藤良子, 大澤侑史, 田嶋智之, 仁科勇太, 仁科勇太, 西政康, 大久保貴広, 高口豊

    日本化学会講演予稿集   94th ( 3 )   2014

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  • J111014 The Effect of Friction Reduction by Water Dispersed Graphene Oxide : Influence of Sliding Material

    Aidil Azli Alias, Nishina Yuta, Kinoshita Hiroshi, Fujii Masahiro

    Mechanical Engineering Congress, Japan   2013   "J111014 - 1"-"J111014-4"   2013.9

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    Language：English   Publisher：The Japan Society of Mechanical Engineers  

    The problems of oil lubricants in waste and maintenance management are crucial for cost and environment. Water with less harmful to environment is suitable as a candidate lubricant to replace oil lubricants. However, water is lack of viscosity, which leads to high friction and severe wear between the sliding materials. Graphene Oxide (GO) is single layer graphite with oxygen functional groups and easy to be dispersed in water. In this study, the effect of friction reduction by water dispersed GO has been evaluated with different sliding materials. The friction coefficients between SUS304 substrate vs. SUS304 ball and SUS304 substrate vs. tungsten carbide (WC) ball were approximately 0.05. Severe wear was apparent on the SUS304 ball surface slid in the GO dispersion; however, only small wear was observed on the WC ball surface after friction test in the GO dispersion.

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  • 微生物由来マンガン酸化物の機能探索-磁性流体を用いた磁性の付与-

    木村倫康, 橋本英樹, SAFARIK Ivo, 仁科勇太, 宮田直幸, 中西真, 藤井達生, 高田潤

    粉体粉末冶金協会講演概要集   2012   2012

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  • 微生物由来マンガン酸化物のキャラクタリゼーションと固体触媒への応用

    木村倫康, 橋本英樹, 仁科勇太, 宮田直幸, 古谷充章, 中西真, 藤井達生, 高田潤

    粉体粉末冶金協会講演概要集   2012   2012

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  • マンガン酸化細菌が作るマンガン酸化物~その基礎・応用研究~(2)炭化水素ハロゲン化触媒特性について

    仁科勇太, 橋本英樹, 木村倫康, 宮田直幸, 大谷文章, 高田潤

    日本化学会講演予稿集   92nd ( 1 )   2012

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  • マンガン酸化細菌が作るマンガン酸化物~その基礎・応用研究~(1)形態的・構造的特徴について

    木村倫康, 橋本英樹, 宮田直幸, 古谷充章, 仁科勇太, 中西真, 藤井達生, 高田潤

    日本化学会講演予稿集   92nd ( 1 )   2012

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Industrial property rights

  • 酸化グラフェン被覆酸化マグネシウム粒子及びその製造方法

    齋藤 彰範, 仁科 勇太

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    Applicant：タテホ化学工業株式会社

    Application no：特願2019-222727  Date applied：2019.12.10

    Announcement no：特開2021-091570  Date announced：2021.6.17

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  • 酸化還元性電子輸送体及び電極

    辻村 清也, 仁科 勇太

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    Applicant：株式会社仁科マテリアル

    Application no：特願2019-194744  Date applied：2019.10.2

    Announcement no：特開2021-061224  Date announced：2021.4.15

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  • 植物病害防除剤及び植物病害の防除方法

    一瀬 勇規, 澤井 拓, オンビロ シゴンベ ゲオフレイ, 能年 義輝, 仁科 勇太, 松井 英譲

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    Applicant：国立大学法人 岡山大学

    Application no：特願2019-037966  Date applied：2019.3.1

    Announcement no：特開2019-151631  Date announced：2019.9.12

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  • 電気二重層キャパシタ

    高井 充, 仁科 勇太, 人見 篤志, 伊藤 秀毅, 檜 圭憲

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    Applicant：TDK株式会社

    Application no：特願2019-027721  Date applied：2019.2.19

    Announcement no：特開2020-136487  Date announced：2020.8.31

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  • 炭素ナノ構造体の生成方法及び炭素ナノ構造体

    池田 直, 仁科 勇太, 狩野 旬, 青柳 佑海人, 藤原 孝将, 森 正和

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    Applicant：国立大学法人 岡山大学

    Application no：特願2018-222786  Date applied：2018.11.28

    Announcement no：特開2019-099989  Date announced：2019.6.24

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  • 水処理用薬剤および水処理方法

    菅原 広, 中村 勇規, 吉川 浩, 仁科 勇太

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    Applicant：オルガノ株式会社

    Application no：特願2018-046785  Date applied：2018.3.14

    Announcement no：特開2019-155292  Date announced：2019.9.19

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  • 接着剤組成物の製造方法および接着剤組成物

    熊本 拓朗, 村上 康之, 仁科 勇太

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    Applicant：日本ゼオン株式会社

    Application no：特願2017-072146  Date applied：2017.3.31

    Announcement no：特開2018-172557  Date announced：2018.11.8

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  • 水性媒体用流動抵抗低減剤組成物

    仁科 勇太, 小方 聡, 栃木 弘, 神田 信

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    Applicant：国立大学法人 岡山大学

    Application no：特願2016-213110  Date applied：2016.10.31

    Announcement no：特開2018-070785  Date announced：2018.5.10

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  • 直鎖炭化水素の製造方法

    仁科 勇太, 池田 俊徳, 門前 雅之

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    Applicant：国立大学法人 岡山大学

    Application no：特願2016-145069  Date applied：2016.7.25

    Announcement no：特開2018-016545  Date announced：2018.2.1

    Patent/Registration no：特許第6464512号  Date registered：2019.1.18 

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  • アゾ化合物の製造方法

    山本 俊一, 赤田 充生, 仁科 勇太

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    Applicant：株式会社仁科マテリアル

    Application no：特願2016-140953  Date applied：2016.7.17

    Announcement no：特開2018-008920  Date announced：2018.1.18

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  • 酸化黒鉛の製造方法

    小野 博信, 鴻巣 修, 郷田 隼, 佐藤 裕一, 仁科 勇太

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    Applicant：株式会社日本触媒

    Application no：特願2016-044584  Date applied：2016.3.8

    Announcement no：特開2017-160070  Date announced：2017.9.14

    Patent/Registration no：特許第6592384号  Date registered：2019.9.27 

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  • 多孔性ポリマーの製造方法

    仁科 勇太, 西原 洋知, 京谷 隆, 大和田 真生, 針谷 明夫

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    Applicant：国立大学法人東北大学

    Application no：特願2016-022476  Date applied：2016.2.9

    Announcement no：特開2017-141335  Date announced：2017.8.17

    Patent/Registration no：特許第6864877号  Date registered：2021.4.7 

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  • 硫黄含有酸化グラフェン又は硫黄含有グラフェン及びその製造方法

    西尾 直高, 大塚 喜弘, 堤 聖晴, 仁科 勇太

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    Applicant：株式会社ダイセル

    Application no：特願2016-008543  Date applied：2016.1.20

    Announcement no：特開2017-128472  Date announced：2017.7.27

    Patent/Registration no：特許第6691782号  Date registered：2020.4.15 

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  • 木質系炭素原子含有物の製造方法及び木質系炭素原子含有物を含有した潤滑剤

    木之下 博, 仁科 勇太, 鈴木 勉, 鈴木 京子

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    Applicant：国立大学法人北見工業大学

    Application no：特願2015-249257  Date applied：2015.12.22

    Announcement no：特開2017-114702  Date announced：2017.6.29

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  • 芳香族化合物を酸化的カップリングさせる方法

    仁科 勇太, 森奥 久実加

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    Applicant：国立大学法人 岡山大学

    Application no：特願2015-153716  Date applied：2015.8.3

    Announcement no：特開2017-031106  Date announced：2017.2.9

    Patent/Registration no：特許第6646295号  Date registered：2020.1.15 

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  • 炭素-金属複合体

    仁科 勇太, 小野 博信

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    Applicant：株式会社仁科マテリアル

    Application no：特願2015-047409  Date applied：2015.3.10

    Announcement no：特開2016-166113  Date announced：2016.9.15

    Patent/Registration no：特許第6476019号  Date registered：2019.2.8 

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  • 水系潤滑液組成物

    木之下 博, 仁科 勇太, 栃木 弘, 神田 信, 渡辺 佳久

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    Applicant：国立大学法人 岡山大学

    Application no：特願2014-235013  Date applied：2014.11.19

    Announcement no：特開2016-098279  Date announced：2016.5.30

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  • 潤滑油組成物

    木之下 博, 仁科 勇太, 栃木 弘, 熊谷 恭大, 渡辺 佳久

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    Applicant：国立大学法人 岡山大学

    Application no：特願2014-199132  Date applied：2014.9.29

    Announcement no：特開2016-069482  Date announced：2016.5.9

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  • 潤滑油及びその製造方法

    木之下 博, 仁科 勇太

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    Applicant：国立大学法人 岡山大学

    Application no：特願2014-172774  Date applied：2014.8.27

    Announcement no：特開2016-047875  Date announced：2016.4.7

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  • 導電性繊維の製造方法、シート状電極の製造方法、導電性繊維、及びシート状電極

    古賀 大尚, 菅沼 克昭, 能木 雅也, 外村 英嗣, 仁科 勇太

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    Applicant：国立大学法人大阪大学

    Application no：特願2014-106142  Date applied：2014.5.22

    Announcement no：特開2015-221947  Date announced：2015.12.10

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  • 水系潤滑剤

    木之下 博, 仁科 勇太

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    Applicant：国立大学法人 岡山大学

    Application no：JP2014063398  Date applied：2014.5.20

    Publication no：WO2014-189065  Date published：20141127

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  • 細胞死抑制剤及びその製造方法

    佐藤 あやの, 仁科 勇太

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    Applicant：国立大学法人 岡山大学

    Application no：特願2015-504347  Date applied：2014.3.5

    Publication no：WO2014-136808  Date published：2014912

    Patent/Registration no：特許第6263815号  Date registered：2018.1.5 

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  • 細胞死抑制剤及び新規化合物

    佐藤 あやの, 仁科 勇太

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    Applicant：国立大学法人 岡山大学

    Application no：特願2015-504346  Date applied：2014.3.5

    Publication no：WO2014-136807  Date published：2014912

    Patent/Registration no：特許第6263814号  Date registered：2018.1.5 

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  • 酸化黒鉛の製造方法及び酸化黒鉛

    仁科 勇太

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    Applicant：仁科 勇太

    Application no：特願2014-036086  Date applied：2014.2.26

    Announcement no：特開2015-160766  Date announced：2015.9.7

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  • 酸化グラフェンに金属を担持させる方法及び金属-酸化グラフェン複合体の製造方法

    仁科 勇太

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    Applicant：国立大学法人 岡山大学

    Application no：特願2014-535610  Date applied：2013.9.13

    Patent/Registration no：特許第6116016号  Date registered：2017.3.31 

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  • 酸化グラフェンに金属を担持させる方法及びこの方法で作成した金属-酸化グラフェン複合体

    仁科 勇太

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    Applicant：国立大学法人 岡山大学

    Application no：JP2013074937  Date applied：2013.9.13

    Publication no：WO2014-042259  Date published：2014320

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  • 金属を担持した薄片状の酸化黒鉛及びその作製方法

    後藤 和馬, 仁科 勇太, 石田 祐之, 橋本 英樹, 藤井 英司

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    Applicant：岡山県

    Application no：特願2013-014821  Date applied：2013.1.29

    Announcement no：特開2014-144892  Date announced：2014.8.14

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  • ハロゲン化触媒及びその製造方法

    仁科 勇太, 高見 佳志

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    Applicant：国立大学法人 岡山大学

    Application no：JP2012080866  Date applied：2012.11.29

    Publication no：WO2013-081034  Date published：201366

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  • 酸化薄片化黒鉛及びその製造方法

    仁科 勇太

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    Applicant：国立大学法人 岡山大学

    Application no：特願2012-083453  Date applied：2012.4.2

    Announcement no：特開2013-212948  Date announced：2013.10.17

    Patent/Registration no：特許第5098064号  Date registered：2012.10.5 

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  • 炭化水素の酸化触媒および炭化水素酸化物の製造方法

    仁科 勇太, 團野 瑛章

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    Applicant：国立大学法人 岡山大学

    Application no：特願2012-029061  Date applied：2012.2.14

    Announcement no：特開2013-166088  Date announced：2013.8.29

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  • ハロゲン化触媒及びハロゲン化合物の製造方法

    仁科 勇太, 橋本 英樹, 高田 潤

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    Applicant：国立大学法人 岡山大学

    Application no：特願2012-553562  Date applied：2011.10.27

    Publication no：WO2012-098746  Date published：2012726

    Patent/Registration no：特許第5863676号  Date registered：2016.1.8 

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  • ハロゲン化触媒およびハロゲン化合物の製造方法

    仁科 勇太, 高井 和彦, 森田 惇也

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    Applicant：国立大学法人 岡山大学

    Application no：特願2012-549663  Date applied：2011.8.17

    Announcement no：特開2012-086159  Date announced：2012.5.10

    Publication no：WO2012-086259  Date published：2012628

    Patent/Registration no：特許第5854405号  Date registered：2015.12.18 

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Awards

  • MEXT Young Scientists' Prize

    2024.4  

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  • 炭素材料学会 奨励賞

    2020.12  

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Research Projects

  • Controlling the spread of antibiotic resistance genes in compost-amended soil using 2-dimensional nanocarbon materials

    Grant number：24K21903  2024.06 - 2027.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Research (Exploratory)

    前田 守弘, 仁科 勇太, 井原 賢

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    Grant amount：\6370000 （ Direct expense: \4900000 、 Indirect expense：\1470000 ）

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  • 未利用有機物の炭素化:資源循環のためのマルチナリーカーボンの創出

    2024 - 2029

    科学技術振興機構  戦略的な研究開発の推進 戦略的創造研究推進事業 CREST 

    仁科 勇太

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    未利用有機物(廃プラスチック、バイオマス、温室効果ガスなど)を利用して、吸着材や電極、触媒として機能する“マルチナリーカーボン”を創出し、炭素材料の国産化と炭素循環技術の構築を目指す。従来の加熱方法では難しかった複雑な有機物の構造制御に挑み、低温・中高温炭素化や触媒炭素化により多孔質・導電性カーボンを生成。さらに、放射光等の先端技術を駆使して構造やメカニズムを解明し、革新的なプロセスを構築する。

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  • Development of sediment microbial fuel cells for improvement of water quality and reduction in greenhouse gas emissions in agricultural drainage canals

    Grant number：22H02458  2022.04 - 2025.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    前田 守弘, 仁科 勇太, 赤尾 聡史, 諸泉 利嗣

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    Grant amount：\17420000 （ Direct expense: \13400000 、 Indirect expense：\4020000 ）

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  • Exploration of functional carbon materials that selectively interact with molecules and ions in water

    Grant number：22H04548  2022.04 - 2024.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    仁科 勇太

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    Grant amount：\4680000 （ Direct expense: \3600000 、 Indirect expense：\1080000 ）

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  • ３次元積層グラフェンの層間カップリング抑制による新規ナノ炭素構造体創成

    Grant number：21H01763  2021.04 - 2024.03

    日本学術振興会  科学研究費助成事業 基盤研究(B)  基盤研究(B)

    小林 慶裕, 仁科 勇太

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    Grant amount：\17420000 （ Direct expense: \13400000 、 Indirect expense：\4020000 ）

    ３次元に積層した単層グラフェンにおいて、本来の物性を著しく変質させる層間相互作用を積層グラフェンの層間へのスペーサ挿入による層間隔拡大や、ランダム積層構造の形成によって抑制することが目的である。その目的に向けて、以下の研究項目について進捗させた。
    ・構造制御酸化グラフェン（GO）のスケーラブル合成：3次元積層グラフェンの出発物質となるGOの合成プロセスで形成される欠陥を低減するために電気化学剥離法の検討を進めた。生成条件を最適化し、低欠陥GOのスケーラブル合成への道筋を明らかにした。
    ・滴下法によるスペーサ導入グラフェン形成：GO層間へのスペーサ材料挿入の有効性を検証するため、基板上にGOとスペーサ材料（カーボンナノチューブ）を交互に滴下して堆積した試料を作製し、その構造をラマン分光法で解析した。スペーサ材料導入は層数増加に伴う2次元性（2Dバンド強度で評価）の減少を著しく抑制する効果があることを見出した。
    ・テンプレート上CVD成長によるランダム積層グラフェン形成：処理時間・圧力・温度について詳細な検討を進め、大面積成長への指針を得た。特に過剰に高温で処理すると、島サイズは拡大するが、多核成長した微細な島が集合した結果であり、高性能化には不適切であることが判明した。さらにドメインサイズ拡大と平坦性向上にむけて、テンプレート形成からその上でのランダム積層成長までを大気にさらさず一貫しておこなうプロセスの検討に着手した。
    ・スペーサ導入グラフェンの構造解析：セルロースナノファイバやナノダイヤモンドを添加したGOからスポンジ状グラフェンを形成し、その構造をX線回折によって評価した。解析の結果、想定したような各層間にスペーサを挿入することはできていないものの、GOの凝集を抑制することによって積層方向の周期性が減少し、熱処理過程でのグラファイト化を抑制する効果があることを示した。

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  • Ultrafast 3D structural dynamics for exploration of photoresponsive materials

    Grant number：20H01832  2020.04 - 2023.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    羽田 真毅, 仁科 勇太, 恩田 健, 大村 訓史

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    Grant amount：\18330000 （ Direct expense: \14100000 、 Indirect expense：\4230000 ）

    本研究提案では、フェムト秒からピコ秒の時間幅を持つパルス電子線を用いた斜入射型の時間分解電子線回折装置を構築し、既存の透過型の時間分解電子線回折装置と組み合わせることで、時間一次元、空間三次元の超高速構造ダイナミクスの可視化技術を創出する。そして、本技術を活用して、無機物質、有機分子、炭素材料など多彩な物質の非平衡状態の構造変化と機能との関係を世界に先駆けて展開し、非平衡超高速構造変化と機能の関係解明のための次世代の超高速三次元構造ダイナミクス観測の科学技術基盤を開拓する。
    2020年度は、斜入射型の時間分解電子線回折装置を構築するとともに、既存の透過型の時間分解電子線回折装置を用いて、カーボンナノチューブのナノスケールで生じるフォノン振動とマクロな熱伝導の関連性を解明することができ、Carbon誌に論文が掲載された。超高速時間分解電子線回折法では、物質の局所的な構造を追うことが特異とされてきたが、本研究はこのナノ特性をバルクの物性と結び付けた学術的な価値の高い研究である。さらに共同研究者と超高速時間分解電子線回折法に関するレビュー論文をAccounts of Chemical Research誌に掲載することができ、今後の超高速時間分解電子線回折法に関する研究の指針を示すことができた。さらに、超高速時間分解電子線回折法により酸化グラフェンのz軸方向のダイナミクス計測（グラフェンの二層化の構造ダイナミクス）にも成功しており、現在論文を投稿中である。

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  • Development of functional carbon materials that selectively interact with molecules and ions in water

    Grant number：20H05224  2020.04 - 2022.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    仁科 勇太

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    Grant amount：\4940000 （ Direct expense: \3800000 、 Indirect expense：\1140000 ）

    本研究では，分子認識可能な機能部位を炭素材料に付与し，水中に含まれる分子またはイオンと選択的に相互作用または除去する材料に展開した。本領域の発展に貢献すべく，A01班が創出する機能性高分子と炭素の複合体，および無機多孔質材料と炭素の複合体の作製を検討した。さらに，機能開拓班（A03班）への橋渡しをスムーズに行えるように，材料の評価および基礎物性評価を実施した。有機合成と炭素材料の両軸で研究を実施することにより，新規な水圏機能材料を創出した。
    具体的には，炭素材料を水圏機能材料として応用すべく水との相互作用を高めるために，親水性官能基を付与した。黒鉛やナノダイヤの酸化条件を変えることにより，酸素含有量を5～50%の範囲で制御し，カルボキシ基を豊富に含むものやヒドロキシ基・エポキシ基を豊富に含むものを作り分けた。また，これら酸素官能基を足掛かりとして，機能性分子を炭素材料上に導入した。合成した機能化炭素材料を用いて，水中の重金属の除去率を評価した。イミノ二酢酸を酸化グラフェン上に固定化した材料が，重金属を選択的に除去できることを見いだした。また，イミノ二酢酸と酸化グラフェンの間にリンカーとなるアルキル鎖をはさむと，その効率が向上した。アルキル鎖の長さの最適化も行い，その妥当性をDFT計算にて検証した。DFT計算を駆使し，イミノ二酢酸の構造を変えることにより，有用な金属を回収するための素材を開発している。

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  • Metal-free and heterogeneous catalysts

    Grant number：19H02718  2019.04 - 2022.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    Nishina Yuta

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    Grant amount：\17160000 （ Direct expense: \13200000 、 Indirect expense：\3960000 ）

    Aiming to build the concept of "carbon catalyst" that does not rely on metal species, this research confirmed the reactivity of carbon materials by changing their structure and functional groups. Through this research, it was found that incorporating nitrogen atoms into carbon and increasing radicals are effective for catalytic activity. It was also found that it is possible to increase radicals by cleaving oxygen functional groups on the carbon surface. It was clarified that nitrogen-doped carbon can be used as a catalyst for the reduction of nitro groups and reduction of oxygen molecules. The carbon material was also found to be effective for the polymerization of styrene, acrylonitrile, vinylpyridine, and styrene sulfonic acid. The detailed mechanism was analyzed by in situ ESR spectroscopy.

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  • Improvement of heat transfer and friction coefficient by graphene oxide nanosheet suspensions

    Grant number：19K04196  2019.04 - 2022.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    Ogata Satoshi

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    Grant amount：\4420000 （ Direct expense: \3400000 、 Indirect expense：\1020000 ）

    Methods for flow drag reduction have become very important from an energy-saving viewpoint. However, when a drag-reducing agent is used in equipment that generates heat and flow, the drag decreases. Simultaneously, the heat-transfer performance deteriorates, hindering the performance enhancement of the heat exchangers. This study investigated graphene oxide (GO) nanosheets as additives that could achieve a trade-off relationship between drag reduction and heat transfer improvement. The experimental results show that the frictional coefficient of the GO nanosheet suspensions was reduced compared to that of distilled water in the turbulent flow region. Meanwhile, the Nusselt number increased in the range of the Reynolds number where the drag reduction occurred. The results demonstrate that GO nanosheet suspensions possess both characteristics of drag reduction and heat-transfer enhancement, which have hitherto been considered difficult to achieve simultaneously.

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  • Molecular design of electrodes for biofuel cells

    Grant number：17K18992  2017.06 - 2019.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Research (Exploratory)  Grant-in-Aid for Challenging Research (Exploratory)

    Nishina Yuta

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    Grant amount：\6500000 （ Direct expense: \5000000 、 Indirect expense：\1500000 ）

    We achieved the following 3 tasks.
    1) Development of mediator molecules that efficiently transfer electrons from enzymes, 2) Establishment of techniques to immobilize enzymes and mediator molecules on electrodes, 3) Establishment of techniques to increase the amount of enzymes and mediator molecules per unit area

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  • Establishment of dispersion technique of graphene oxide in lubricating oils, and its synergistic effect with other additives and low temperature operation

    Grant number：17H03165  2017.04 - 2020.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    KINOSHITA Hiroshi

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    Grant amount：\17160000 （ Direct expense: \13200000 、 Indirect expense：\3960000 ）

    Graphene oxides were reduced by heating or using a dispersant, and then they were added to the lubricating oil. In heat dispersion, the friction coefficient was lower than that without addition, however it did not depend on the dispersion temperature. Wear was lower than without addition, and the lower the heating temperature, the lower the wear. Using the dispersant, a friction coefficient was lower than that without the addition, however it did not depend on the concentration of the dispersant. Wear was smaller than that without the addition when the concentration of the dispersant was low. In particular, High lubricity of graphene oxide was observed even at low temperatures. It was also found that the friction force becomes very low when graphene oxide was used in combination with ZnDTP.

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  • Synthesis of novel nanocarbon materials by ultrahigh temperature process under reactive environment

    Grant number：17H02745  2017.04 - 2020.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    Kobayashi Yoshihiro

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    Grant amount：\18330000 （ Direct expense: \14100000 、 Indirect expense：\4230000 ）

    We have developed a thermal process for synthesizing low-defect/turbostratic/multilayer graphene thin films, which are nanocarbon structures with excellent two-dimensional physical properties comparable to single-layer graphene, by a thermal process at ultrahigh temperature under reactive atmosphere. The physical superiority originated from the turbostratic structure was verified from optical and electrical properties. Turbostratic multilayer graphene was synthesized by direct growth on template graphene, in addition to use graphene oxide as starting material. The interaction between graphene layers was controlled by inserting cellulose nanofibers and nanodiamonds between the layers, and it is effective for revealing the monolayer-like properties. Carrier transport properties such as mobility and conductivity were significantly improved, owing to the monolayer-like property caused from the turbostratic stacking and shielding of environmental effects by multilayer structure.

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  • Development of ultrahigh rate lithium ion battery via polarization assist incorporation into electrodes

    Grant number：16K14094  2016.04 - 2018.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research  Grant-in-Aid for Challenging Exploratory Research

    Teranishi Takashi

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    Grant amount：\3770000 （ Direct expense: \2900000 、 Indirect expense：\870000 ）

    There is huge demand for lithium ion battery with ultrahigh rate capability. We aim to simultaneously incorporate polarization assist architecture into both cathode and anode electrodes, in attempt to activate interfacial charge transfer. LiCoO2 modified with BaTiO3 is utilized as cathode, while the graphene oxides, rGO, and nitridized rGO are employed for anode active material for assembling full cells. In fact, modified electrodes exhibit significantly greater power density; discharge capacity of modified sample at 5th cycle at 10C rate is ca. 15 times as high as conventional electrodes, i.e., bare LCO/Graphite. The result implies the polarization assist architecture incorporated into both cathodes and anodes effectively improves the power density of lithium ion batteries.

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  • 各種用途に適した酸化グラフェンおよびグラフェンの合成

    Grant number：16H00915  2016.04 - 2018.03

    日本学術振興会  科学研究費助成事業 新学術領域研究(研究領域提案型)  新学術領域研究(研究領域提案型)

    仁科 勇太

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    Grant amount：\4680000 （ Direct expense: \3600000 、 Indirect expense：\1080000 ）

    グラフェンに期待される応用は非常に幅広い。要求される性能に応じて、サイズや表面の官能基および欠陥を変える必要がある。本研究では、酸化グラフェンに着目した。酸化グラフェンを還元するとグラフェンに似た材料が得られるためである。また、酸化グラフェンは量産化に適しており、将来的な実用化に適した材料であることも、酸化グラフェンを用いるモチベーションとなっている。酸化グラフェンからグラフェンを作製するためには、酸化グラフェンの化学状態や還元手法を選ぶ必要がある。溶液中の酸化グラフェンをそのまま還元すれば、酸化グラフェンどうしが凝集してしまう。グラフェン膜を形成したい場合には、基板上に酸化グラフェン膜を形成し、その場で還元することが好ましい。また、化学還元法では、還元剤の一部がグラフェン骨格内にドーピングされたり、吸着したりする。さらに、高温でアルコール蒸気に曝すと、還元が進行しつつ欠陥が修復される。また、用途に応じて酸化グラフェンの配向を変える方法を確立し、その物性を評価した。こうして作製した、さまざまな酸素含有量や配向性を有する酸化グラフェンを共同研究先に提供し、用途開拓を行った。リチウムイオン電池、潤滑添加剤、触媒などの従来の用途に加え、本年は遺伝子治療に適用が期待されているsiRNA複合体の作製にも成功した。国内外の多くの研究者との協力関係を構築することにも成功し、さらに酸化グラフェンの量産化への道も開拓することができた。

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  • International supports of atomic layered materials and promoting the collaborated research

    Grant number：15K21722  2015.11 - 2019.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Saito Riichiro, NISHINA yuta, YANAGI kazuhiro, KAWANO yukio

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    Grant amount：\45890000 （ Direct expense: \35300000 、 Indirect expense：\10590000 ）

    Atomic layered materials, which are the thinnest material in the nature, have shown unique and significant properties and thus the research of the atomic layered materials are very active in the world for recent decades. In particular, hexagonal boron nitride (h-BN) is an important atomically-flat materials which can produce only in Japan. In this project, we support the supply of hBN samples internationally to enhance the international collaboration, which is very efficient for promoting the activity not only domestic but also international research. Further, sending or inviting many young researchers for the international collaborating research on atomic layer materials by this project, we encourage young scientists to establish a new network of the research. This is an important results of the project for our continuing the research for the next generation.

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  • Inhibition of fatigue fractures using graphene oxide as innovative lubricant additive

    Grant number：15K13858  2015.04 - 2017.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research  Grant-in-Aid for Challenging Exploratory Research

    KINOSHITA HIROSHI, FUJII Masahiro, NISHINA Yuta

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    Grant amount：\3900000 （ Direct expense: \3000000 、 Indirect expense：\900000 ）

    In order to prevent fatigue fractures by repeated stress, hardness of contact materials have been increased. However it is not sufficient. In this study, we carried out to improve fatigue life using dispersing graphene oxide in lubricating oil. Dispersion methods of graphene oxide in lubricating oil and rolling tester with minimum lubricating oils were developed. Improvement of fatigue life was achieved by the dispersing graphene oxide in the lubricating oil. However, formation of tribofilm which seems to greatly improve fatigue life was not achieved. In the future, in order to achieve further improvement of fatigue life, we will discover dispersants that will improve formation of tribofilms.

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  • 金属－酸化グラフェン複合体触媒を用いる生物由来化合物の水中での化学変換

    Grant number：15F15074  2015

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    仁科 勇太, VERMA SANNY

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    Grant amount：\1200000 （ Direct expense: \1200000 ）

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  • Characterization of golgins in secretion and Golgi

    Grant number：26440055  2014.04 - 2018.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)  Grant-in-Aid for Scientific Research (C)

    Satoh Ayano, Nishino Kunihiko, Nishino Mitsuko, Nishina Yuta, Yu Sidney

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    Grant amount：\5070000 （ Direct expense: \3900000 、 Indirect expense：\1170000 ）

    We have shown that secretion increases and the structure of the Golgi changes when knocking down giantin, which is one of the Golgin protein group. In this research project, to clarify the molecular mechanisms underlying this phenomenon as the ultimate goal, the structure of the Golgi was analyzed in detail using electron beam tomography and the like. Also, during this time, we discovered a novel small molecule involved in secretion regulation, so we performed the characterization of new molecules, as well.

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  • Development of graphene oxide as new tailor-made lubricating additives

    Grant number：26289028  2014.04 - 2018.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)  Grant-in-Aid for Scientific Research (B)

    Kinoshita Hiroshi

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    Grant amount：\15470000 （ Direct expense: \11900000 、 Indirect expense：\3570000 ）

    Graphene oxide (GO) has one layer of graphite structure with a size of over several μm. In addition, GO has many oxygen functional groups. In this study, tribological properties of GO dispersions in water, ionic liquid, and lubricating oil. The very low friction coefficient obtained by GO water dispersion can be achieved by the synergetic effect of the formation of the tribofilm and the presence of GO on the sliding surface. When GO was dispersed in ionic liquid, a slight effect of reducing friction coefficient was observed. In addition, corrosion wear of ionic liquid friction was suppressed by adding GO in ionic liquid, but the sliding wear was increased in increasing concentration of GO. When GO was added to lubricating oil, lubricating property was improved as GO was dispersed in lubricating oil using anionic surfactant.

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  • 酸化グラフェンの欠陥を有機分子で修復する

    Grant number：26107528  2014.04 - 2016.03

    日本学術振興会  科学研究費助成事業 新学術領域研究(研究領域提案型)  新学術領域研究(研究領域提案型)

    仁科 勇太

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    Grant amount：\4810000 （ Direct expense: \3700000 、 Indirect expense：\1110000 ）

    酸化グラフェン（Graphene Oxide, GO）は、溶液中の化学プロセスで大量合成が可能なため、実用化が最も近いナノカーボン材料の一つであると期待されている。この性質は、既存の化学工場の設備を活用できるという特徴を持っている。また、合成に必要な黒鉛は、安価かつ大量に入手可能な材料で、資源枯渇、自然環境への影響が小さいという特徴がある。現在、ＧＯは、電極、触媒、水浄化、放熱、樹脂補強材、潤滑剤などのさまざまな用途が見込まれている。しかし、ＧＯは濃硫酸中で強力な酸化剤を用いて合成するため、その製造条件の設定が難しく、安全かつ効率的に大量合成する方法が確立されていない。これまで我々は、ＧＯを安全かつ大量に製造する技術を開発し、さまざまな用途への実用化に向けて、研究を進めてきた。
    GOの性質は，用いる黒鉛の種類や形状・サイズにより大きく変化する。GOの性質を変える本質を解明することは，学術面のみならず品質の保証や再現性の確保の観点においても重要である。ＧＯを化学修飾したり，酸化・還元をメカニズムに基づき行うことで，再現性良く望みのＧＯを合成することに成功した。

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  • Preparation of high-performance catalysts by oxidation state control of Pd on GO

    Grant number：25870457  2013.04 - 2015.03

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)  Grant-in-Aid for Young Scientists (B)

    NISHINA Yuta

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    Grant amount：\4420000 （ Direct expense: \3400000 、 Indirect expense：\1020000 ）

    Graphene oxide (GO) is a two-dimensional sheet of sp2-hybridized carbon. Due to its extraordinary thermal, mechanical, and electrical properties, GO has attracted much interest. Pd/GO, a composite of Pd nanoparticle and exfoliated graphene, was used as a catalyst in organic reactions. In Suzuki-Miyaura cross coupling reaction, Pd/GO showed high reusability without aggregation of Pd nanoparticle.

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  • 7族元素を用いるC-H結合活性化を基盤とする有機合成反応の開発

    Grant number：08J06785  2008 - 2009

    日本学術振興会  科学研究費助成事業 特別研究員奨励費  特別研究員奨励費

    仁科 勇太

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    Grant amount：\1200000 （ Direct expense: \1200000 ）

    単純な有機化合物から複雑な化合物を合成するには、数段階にわたる炭素-炭素結合(C-C結合)形成と官能基変換を組み合わせることになるため、効率の高い合成反応の開発が望まれている。有機ハロゲン化合物を用いる反応では、あらかじめ基質分子内にハロゲン原子(X)の導入が必要であり、反応後にそのハロゲンが不要な塩として副生する。これに対し、有機化合物中に多く存在する炭素-水素結合(C-H結合)から直接にC-C結合が形成できれば、C-H結合を一旦、C-X結合などに変換する必要がなく、反応ステップ数も減るとともに、当然ながら反応のあとにハロゲン塩が副生しない。C-H結合活性化反応の適用限界を拡げることは、有機合成において、重要なことである。
    本研究では、有機合成の触媒として使われることが少なかった7族元素の触媒作用を明らかにし、新しいコンセプトに基づいて反応開発を行なった。その結果、C-H結合活性化反応の適用範囲を拡げ、実用的で一般的な合成手法へと展開することができた。具体的には、これまではベンゼン環上のC-H結合活性化が大部分を占めていたが、本研究ではそれをアルケンのC-H結合活性化へと展開した。C-H結合へ挿入する分子も極性をもたないアルキンからアルデヒドのような分極したものまで、幅広い基質で適用できる反応条件を見いだすことができた。さらに現在は、より一般的な基質であるアルカンのC-H結合を直接変換する反応の開発を行なっている。従来、有機合成の原料として認識されていなかった炭化水素を用いた効率的な反応につながる可能性を秘めている。

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  • Molecular Technology （2024academic year） Late  - その他

  • Molecular Technology （2024academic year） Late  - その他

  • Molecular Technology （2024academic year） Late  - その他

  • Applied Organometallic Chemistry and Catalysis （2024academic year） Prophase  - 木3～4

  • Homogeneous Catalysis 1 （2024academic year） Prophase  - その他

  • Seminar on Applied Chemistry 1 （2024academic year） Prophase  - その他

  • Seminar on Applied Chemistry 2 （2024academic year） Late  - その他

  • Research Works for Master Thesis on Applied Chemistry （2024academic year） Year-round  - その他

  • Seminar in Advanced Chemistry （2024academic year） Other  - その他

  • Fundamental Organic Chemistry 1 （2024academic year） 1st semester  - 金3～4

  • Fundamental Organic Chemistry 2 （2024academic year） Second semester  - 金3～4

  • Organic Chemistry 1 （2024academic year） 1st and 2nd semester  - 金3～4

  • Organic Chemistry 3 （2024academic year） 1st semester  - 月3～4,木1～2

  • Organic Chemistry 4 （2024academic year） 1st semester  - 月3～4,木1～2

  • Organotransition Metal Chemistry （2024academic year） Prophase  - その他

  • Materials Process Engineering 1 （2024academic year） Prophase  - その他

  • Materials Process Engineering 2 （2024academic year） Prophase  - その他

  • Instrumental Analysis （2024academic year） 3rd and 4th semester  - 水3～4

  • Instrumental Analysis （2024academic year） 3rd and 4th semester  - 水3～4

  • Instrumental Analysis 1 （2024academic year） Third semester  - 水3～4

  • Instrumental Analysis 2 （2024academic year） Fourth semester  - 水3～4

  • Instrumental Analysis for Chemistry Ⅱ （2024academic year） Fourth semester  - 水3～4

  • Instrumental Analysis for Chemistry I （2024academic year） Third semester  - 水3～4

  • Seminar in Functional Molecular Engineering （2024academic year） Year-round  - その他

  • Seminar in Functional Molecular Engineering （2024academic year） Other  - その他

  • Seminar in Functional Molecular Engineering （2024academic year） Year-round  - その他

  • Seminar in Functional Molecular Engineering （2024academic year） Year-round  - その他

  • Physical Organic Chemistry （2024academic year） Fourth semester  - 火1～2

  • Advanced Study （2024academic year） Other  - その他

  • Low-carbon and Resource Circulation Process Engineering （2023academic year） Prophase  - 月3～4

  • Molecular Technology （2023academic year） Late  - その他

  • Molecular Technology （2023academic year） Late  - その他

  • Fundamentals of Organic Chemistry （2023academic year） 1st semester  - 金3～4

  • Applied Organometallic Chemistry and Catalysis （2023academic year） Prophase  - 木3～4

  • Homogeneous Catalysis 1 （2023academic year） Prophase  - その他

  • Seminar on Applied Chemistry 1 （2023academic year） Prophase  - その他

  • Seminar on Applied Chemistry 2 （2023academic year） Late  - その他

  • Research Works for Master Thesis on Applied Chemistry （2023academic year） Year-round  - その他

  • Seminar in Advanced Chemistry （2023academic year） Other  - その他

  • Fundamental Organic Chemistry 1 （2023academic year） 1st semester  - 金3～4

  • Fundamental Organic Chemistry 2 （2023academic year） Second semester  - 金3～4

  • Organic Chemistry 1 （2023academic year） 1st and 2nd semester  - 金3～4

  • Organic Chemistry 3 （2023academic year） 1st semester  - 月3～4,木1～2

  • Organic Chemistry 4 （2023academic year） 1st semester  - 月3～4,木1～2

  • Organic Chemistry I （2023academic year） Second semester  - 金3～4

  • Organotransition Metal Chemistry （2023academic year） Prophase  - その他

  • Materials Process Engineering 1 （2023academic year） Prophase  - その他

  • Materials Process Engineering 2 （2023academic year） Prophase  - その他

  • Instrumental Analysis （2023academic year） 3rd and 4th semester  - 水3～4

  • Instrumental Analysis （2023academic year） 3rd and 4th semester  - 水3～4

  • Instrumental Analysis 1 （2023academic year） Third semester  - 水3～4

  • Instrumental Analysis 2 （2023academic year） Fourth semester  - 水3～4

  • Instrumental Analysis for Chemistry Ⅱ （2023academic year） Fourth semester  - 水3～4

  • Instrumental Analysis for Chemistry I （2023academic year） Third semester  - 水3～4

  • Seminar in Functional Molecular Engineering （2023academic year） Other  - その他

  • Seminar in Functional Molecular Engineering （2023academic year） Year-round  - その他

  • Seminar in Functional Molecular Engineering （2023academic year） Year-round  - その他

  • Physical Organic Chemistry （2023academic year） Fourth semester  - 火1～2

  • Advanced Study （2023academic year） Other  - その他

  • Nano-materials Chemistry （2022academic year） Prophase  - 月1,月2

  • Molecular Technology （2022academic year） Late  - その他

  • Basic Experiments in Chemistry （2022academic year） 1st and 2nd semester  - 月5～8

  • Basic Experiments in Chemistry （2022academic year） 1st and 2nd semester  - 木5～8

  • Basic Experiments in Chemistry （2022academic year） 1st and 2nd semester  - 月5～8

  • Basic Experiments in Chemistry （2022academic year） 1st and 2nd semester  - 木5～8

  • Internship in Applied Chemistry （2022academic year） Prophase  - その他

  • Seminar on Applied Chemistry 1 （2022academic year） Prophase  - その他

  • Seminar on Applied Chemistry 2 （2022academic year） Late  - その他

  • Research Works for Master Thesis on Applied Chemistry （2022academic year） Year-round  - その他

  • Organic Chemistry 3 （2022academic year） Third semester  - 月3～4,火3～4

  • Instrumental Analysis （2022academic year） 3rd and 4th semester  - 水3～4

  • Instrumental Analysis （2022academic year） 3rd and 4th semester  - 水3～4

  • Instrumental Analysis 1 （2022academic year） Third semester  - 水3～4

  • Instrumental Analysis 2 （2022academic year） Fourth semester  - 水3～4

  • Seminar in Functional Molecular Engineering （2022academic year） Year-round  - その他

  • Physical Organic Chemistry （2022academic year） Fourth semester  - 火1～2

  • Physical Organic Chemistry （2022academic year） Fourth semester  - 火1～2

  • Nano-materials Chemistry （2021academic year） Prophase  - 月1,月2

  • Molecular Technology （2021academic year） Late  - その他

  • Basic Experiments in Chemistry （2021academic year） 1st and 2nd semester  - 月5,月6,月7,月8

  • Basic Experiments in Chemistry （2021academic year） 1st and 2nd semester  - 木5,木6,木7,木8

  • Basic Experiments in Chemistry （2021academic year） 1st and 2nd semester  - 月5,月6,月7,月8

  • Basic Experiments in Chemistry （2021academic year） 1st and 2nd semester  - 木5,木6,木7,木8

  • Internship in Applied Chemistry （2021academic year） Prophase  - その他

  • Seminar on Applied Chemistry 1 （2021academic year） Prophase  - その他

  • Seminar on Applied Chemistry 2 （2021academic year） Late  - その他

  • Research Works for Master Thesis on Applied Chemistry （2021academic year） Year-round  - その他

  • Organic Chemistry 3 （2021academic year） Fourth semester  - 月1,月2,木1,木2

  • Instrumental Analysis （2021academic year） Third semester  - 火1,火2,水3,水4

  • Instrumental Analysis 1 （2021academic year） Third semester  - 火1,火2

  • Instrumental Analysis 2 （2021academic year） Third semester  - 水3,水4

  • Seminar in Functional Molecular Engineering （2021academic year） Year-round  - その他

  • Physical Organic Chemistry （2021academic year） Fourth semester  - 火1,火2

  • Physical Organic Chemistry （2021academic year） Fourth semester  - 火1,火2

  • Nano-materials Chemistry （2020academic year） Prophase  - 月1,月2

  • Molecular Technology （2020academic year） special  - その他

  • Basic Experiments in Chemistry （2020academic year） 1st and 2nd semester  - 月5,月6,月7,月8

  • Basic Experiments in Chemistry （2020academic year） 1st and 2nd semester  - 木4,木5,木6,木7

  • Basic Experiments in Chemistry （2020academic year） 1st and 2nd semester  - 月5,月6,月7,月8

  • Basic Experiments in Chemistry （2020academic year） 1st and 2nd semester  - 木4,木5,木6,木7

  • Internship in Applied Chemistry （2020academic year） Prophase  - その他

  • Seminar on Applied Chemistry 1 （2020academic year） Prophase  - その他

  • Seminar on Applied Chemistry 2 （2020academic year） Late  - その他

  • Research Works for Master Thesis on Applied Chemistry （2020academic year） Year-round  - その他

  • Organic Chemistry 3 （2020academic year） Fourth semester  - 月1,月2,木1,木2

  • Instrumental Analysis （2020academic year） Third semester  - 火1,火2,水3,水4

  • Instrumental Analysis 1 （2020academic year） Third semester  - 火1,火2

  • Instrumental Analysis 2 （2020academic year） Third semester  - 水3,水4

  • Seminar in Functional Molecular Engineering （2020academic year） Year-round  - その他

  • Physical Organic Chemistry （2020academic year） Fourth semester  - 火1,火2

  • Physical Organic Chemistry （2020academic year） Fourth semester  - 火1,火2

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