研究者詳細 - 林　靖彦

論文 - 林　靖彦

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Controlled Fano Resonances via Symmetry Breaking in Metamaterials for High-Sensitive Infrared Spectroscopy 査読

Shuhei Hara, Atsushi Ishikawa, Takuo Tanaka, Yasuhiko Hayashi, Kenji Tsuruta

METAMATERIALS, METADEVICES, AND METASYSTEMS 2016 9918 2016年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：SPIE-INT SOC OPTICAL ENGINEERING

A high-sensitive polarized surface-enhanced infrared absorption (polarized SEIRA) is proposed and demonstrated by utilizing the resonant coupling of Fano-resonant mode of the asymmetric metamaterials and IR vibrational mode of a polymer nano-film. The asymmetric metamaterials consisting of an Au nano-rod pair with a coupling nano-antenna were fabricated and characterized to demonstrate the controlled Fano resonances at 1730 cm(-1), which spectrally overlapped with the C=O stretching vibrational mode. In the co-polarized SEIRA measurement, the C=O mode of the PMMA nano-film was clearly observed as a conventional anti-resonant peak within the Fano line-shape of the metamaterial. For the cross-polarized case, on the other hand, a distinctive dip appeared within a cross-polarized transmission peak of the metamaterial. Since the unwanted background is strongly suppressed in the cross-polarized detection scheme, the signal contrast was dramatically improved, allowing for the attomole detection of the C=O bond in the far-field measurement. Our metamaterial approach achieves the significant improvement of signal-to-background ratio in the far-field measurement, thus paving the way toward the high-sensitive analysis of functional group in direct IR spectroscopy.

DOI： 10.1117/12.2237559

その他リンク： http://orcid.org/0000-0002-4113-5548

Carbon nanostructures synthesized via self-assembly (LLIP) and its application in FET 査読

P. S. Karthik, Yuma Shimo, Zaw Lin, Venkata Krishna R. Rao, Xiao Gong, Mitsunobu Yoshida, Masaki Hada, Takeshi Nishikawa, Yasuhiko Hayashi, S. P. Singh

2016 IEEE 11TH ANNUAL INTERNATIONAL CONFERENCE ON NANO/MICRO ENGINEERED AND MOLECULAR SYSTEMS (NEMS) 468 - 472 2016年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

Here in, we report carbon nanostructures (nanorods) synthesized via liquid-liquid interface precipitation method (LLIP) with its application in field effect transistor as gate terminal. The carbon nanorods were synthesized by supersaturating and shape shifting Bucky ball fullerene into nanorods. The nanoparticles synthesis process is fast, efficient and the reaction is carried out in 24hrs. The obtained nanorods were found to have semiconducting property which was confirmed by analyzing TEM, SEM and RAMAN, FET analysis by IV measurements. Hence the nanorods where fabricated as gate terminal in field effect transistor.

DOI： 10.1109/NEMS.2016.7758292

その他リンク： http://orcid.org/0000-0002-4113-5548

Self-Assembled C-60 Fullerene Cylindrical Nanotubes by LLIP method 査読

Venkata Krishna R. Rao, P. S. Karthik, Venkata K. Abhinav, Zaw Lin, May Thu Zar Myint, Takeshi Nishikawa, Masaki Hada, Yoshifumi Yamashita, Yasuhiko Hayashi, Surya Prakash Singh

2016 IEEE 16TH INTERNATIONAL CONFERENCE ON NANOTECHNOLOGY (IEEE-NANO) 303 - 306 2016年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

In this article, we report C60 Fullerene Nano Cylindrical Tubes (FNCT). The FNCTs were synthesized by a liquid-liquid interface precipitation (LLIP) method using m-Xylene as a saturating solvent and TBA (Tetra butyl alcoholic) as precipitation agent leading to the formation of FNCTs with uniquely structured and well oriented size and shape. The experiment was conducted in a closed atmosphere maintaining a low temperature. The main advantage of these structures is that they are stable up to 5 months in normal room temperature. Characterizations were done to the FNCTs and concluded to have applications in the field of electronics. Enhanced semiconducting properties have been observed in the nanostructures which can be used in the application of solar cells, FET transistors, etc.

DOI： 10.1109/NANO.2016.7751386

その他リンク： http://orcid.org/0000-0002-4113-5548

Dispersion of relatively long multi-walled carbon nanotubes in water using ozone generated by dielectric barrier discharge 査読

Zaw Lin, Mitsunobu Yoshida, Yuki Uesugi, Karthik Paneer, Takeshi Nishikawa, Yasuhiko Hayashi

IEEJ Transactions on Fundamentals and Materials 136 ( 4 ) 180 - 185 2016年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：Institute of Electrical Engineers of Japan

This paper describes the effect of ozone treatment on water dispersibility of micrometer order long multi-walled carbon nanotubes by using simple ozone generation set up. Inverter type neon transformer was used to supply required energy. The dispersed nanotubes suspension was stable for a few months after treatment. Laser Raman Spectroscopy, Fourier Transform Infrared Spectroscopy, and Transmission Electron Miscroscope were used to characterize the resulted nanotubes. Analyzed data revealed that the multi-walled carbon nanotubes were functionalized by oxygen and hydrogen containing groups.

DOI： 10.1541/ieejfms.136.180

その他リンク： http://orcid.org/0000-0002-4113-5548

In situ observation of carbon nanotube yarn during voltage application 査読

Tomoharu Tokunaga, Yasuhiko Hayashi, Toru Iijima, Yuki Uesugi, Masaki Unten, Katsuhiro Sasaki, Takahisa Yamamoto

MICRON 74 30 - 34 2015年7月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD

Carbon nanotube (CNT) yarns are fabricated by drawing (combined with spinning) from CNT forests and grown on a substrate. Three types of phenomena occur in these CNT yarns with increasing amounts of current: yarn rotation, catalyst evaporation, and breakage of the yarn. These phenomena result from the resistive heating occurring during the current flow, and have been observed in situ under vacuum by transmission electron microscopy. If these CNT yarns are applied to electronic circuits, the rotation and breakage may lead to circuit failure. However, catalyst evaporation is a useful method for purifying CNT yarns without additional treatments prior to yarn fabrication. (C) 2015 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.micron.2015.04.004

その他リンク： http://orcid.org/0000-0002-4113-5548

Synergistic Effect of Bolus Exposure to Zinc Oxide Nanoparticles on Bleomycin-Induced Secretion of Pro-Fibrotic Cytokines without Lasting Fibrotic Changes in Murine Lungs 査読国際誌

Wenting Wu, Gaku Ichihara, Naozumi Hashimoto, Yoshinori Hasegawa, Yasuhiko Hayashi, Saeko Tada-Oikawa, Yuka Suzuki, Jie Chang, Masashi Kato, Corina N. D'Alessandro-Gabazza, Esteban C. Gabazza, Sahoko Ichihara

INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES 16 ( 1 ) 660 - 676 2015年1月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：MDPI

Zinc oxide (ZnO) nanoparticles are widely used in various products, and the safety evaluation of this manufactured material is important. The present study investigated the inflammatory and fibrotic effects of pulmonary exposure to ZnO nanoparticles in a mouse model of pulmonary fibrosis. Pulmonary fibrosis was induced by constant subcutaneous infusion of bleomycin (BLM). Female C57BL/6Jcl mice were divided into BLM-treated and non-treated groups. In each treatment group, 0, 10, 20 or 30 mu g of ZnO nanoparticles were delivered into the lungs through pharyngeal aspiration. Bronchoalveolar lavage fluid (BALF) and the lungs were sampled at Day 10 or 14 after administration. Pulmonary exposure by a single bolus of ZnO nanoparticles resulted in severe, but transient inflammatory infiltration and thickening of the alveolar septa in the lungs, along with the increase of total and differential cell counts in BLAF. The BALF level of interleukin (IL)-1 beta and transforming growth factor (TGF)-beta was increased at Day 10 and 14, respectively. At Day 10, the synergistic effect of BLM and ZnO exposure was detected on IL-1 beta and monocyte chemotactic protein (MCP)-1 in BALF. The present study demonstrated the synergistic effect of pulmonary exposure to ZnO nanoparticles and subcutaneous infusion of BLM on the secretion of pro-fibrotic cytokines in the lungs.

DOI： 10.3390/ijms16010660

その他リンク： http://orcid.org/0000-0002-4113-5548

Improved Properties of Carbon Nanotube Yarn Spun from Dense and Long Carbon Nanotube Forest 査読

Yasuhiko Hayashi, Toru Iijima, Daisuke Suzuki, Hiroshi Kinoshita, Hisayoshi Oshima, Tomoharu Tokunaga

2015 INTERNATIONAL CONFERENCE ON MANIPULATION, MANUFACTURING AND MEASUREMENT ON THE NANOSCALE (3M-NANO) 298 - 301 2015年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

Notable progress has been made recently on the properties and applications of Carbon nanotube ( CNT). However, CNT has not achieved any remarkable practical applications from the industrial point of view. In this article, we report our recent progress on the bulk fiber structure of CNT yarn spun from the CNT forest. The unique fiber-like structure of CNT yarns gives them exceptional mechanical toughness, electrical conductivity, resilience to bending stress, and blend with polymer materials for a composite structure. CNT yarn, which is produced by spinning of high dense and relatively long CNT forest, has emerged as a new high-performance CNT-based bulk and composite material. We have made improvements in properties of CNT yarn by applying high voltage ( HV) to the CNT yarn in a vacuum chamber. The tensile strengths of as-spun and HV-treated CNT yarns were 624 MPa and 955 MPa, respectively. The crystallization behavior of the amorphous carbon on CNTs was confirmed by a Transmission Electron Microscope ( TEM). The CNT yarns provide them mechanical properties different from those of original high-performance fiber.

DOI： 10.1109/3M-NANO.2015.7425488

その他リンク： http://orcid.org/0000-0002-4113-5548

Transistors fabricated using the single crystals of [8]phenacene 査読

Yuma Shimo, Takahiro Mikami, Hiroto T. Murakami, Shino Hamao, Hidenori Goto, Hideki Okamoto, Shin Gohda, Kaori Sato, Antonio Cassinese, Yasuhiko Hayashi, Yoshihiro Kubozono

JOURNAL OF MATERIALS CHEMISTRY C 3 ( 28 ) 7370 - 7378 2015年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ROYAL SOC CHEMISTRY

Field-effect transistors (FETs) with single crystals of a new phenacene-type molecule, [8]phenacene, were fabricated and characterized. This new molecule consists of a phenacene core of eight benzene rings, with an extended p-conjugated system, which was recently synthesized for use in an FET by our group. The FET characteristics of an [8]phenacene single-crystal FET with SiO2 gate dielectrics show typical p-channel properties with an average field-effect mobility, <mu >, as high as 3(2) cm(2) V-1 s(-1) in two-terminal measurement mode, which is a relatively high value for a p-channel single-crystal FET. The hmi was determined to be 6(2) cm(2) V-1 s(-1) in four-terminal measurement mode. Low-voltage operation was achieved with PbZr0.52Ti0.48O3 (PZT) as the gate dielectric, and an electric-double-layer (EDL) capacitor. The <mu > and average values of absolute threshold voltage, <vertical bar V-th vertical bar >, were 1.6(4) cm(2) V-1 s(-1) and 5(1) V, respectively, for PZT, and 4(2) x 10(-1) cm(2) V-1 s(-1) and 2.38(4) V, respectively, for the EDL capacitor; these values were evaluated in two-terminal measurement mode. The inverter circuit was fabricated using [8]phenacene and N, N'-1H, 1H-perfluorobutyldicyanoperylene-carboxydi-imide single-crystal FETs. This is the first logic gate circuit using phenacene molecules. Furthermore, the relationship between mu and the number of benzene rings was clarified based on this study and the previous studies on phenacene single-crystal FETs.

DOI： 10.1039/c5tc00960j

その他リンク： http://orcid.org/0000-0002-4113-5548

21aCJ-9 電子線照射により拡大した積層欠陥の縮小に伴う4H-SiCエピ膜中部分転位の運動

山下善文, 下村拓也, 西川亘, 林靖彦

日本物理学会講演概要集 70 2683 - 2683 2015年

マイクロ波表面波プラズマCVD法によるグラフェンの合成

市村進, 林靖彦, 梅野正義

表面科学学術講演会要旨集 35 272 - 272 2015年

Phenol resin carbonized films with anisotropic shrinkage driven ordered mesoporous structures 査読

Tatsuo Kimura, Ayhan M. Emre, Kazumi Kato, Yasuhiko Hayashi

Journal of Materials Chemistry A 1 ( 47 ) 15135 - 15141 2013年12月

記述言語：英語掲載種別：研究論文（学術雑誌）

High surface area and accessibility to the surface are very important for designing advanced electrodes for energy storage, battery, and capacitor systems because electrons are delivered at the surfaces of carbon based electrodes after diffusion into pore spaces. In this study, phenol resin carbonized porous films with controllable mesostructures and highly accessible surfaces were fabricated using the common EOnPOmEOn-type triblock copolymer. Unique mesostructural transformation of cage-type and tubular mesopores by anisotropic shrinkage was demonstrated from analytical data of the films carbonized at different temperatures. The development of the soft-templating method to obtain surfactant assisted carbon films showing high surface areas is quite significant because further design of mesostructure (anisotropic shrinkage), composition (nitrogen doping, combination with other well-designed carbon based materials) and morphology (coating, spraying, etc.) would be possible for making high-performance electrodes for fuel cells, solar cells, batteries, and energy storage systems, as well as catalytic supports and adsorbents for functional chemical synthesis, purification, and separation. © 2013 The Royal Society of Chemistry.

DOI： 10.1039/c3ta13026f

その他リンク： http://orcid.org/0000-0002-4113-5548

Highly transparent and flexible field electron emitters based on hybrid carbon nanostructure 査読

Debasish Ghosh, Pradip Ghosh, Takuto Noda, Yasuhiko Hayashi, Masaki Tanemura

PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS 7 ( 12 ) 1080 - 1083 2013年12月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：WILEY-V C H VERLAG GMBH

We demonstrate a unique strategy to fabricate highly transparent and flexible field electron emitters (FEEs) based on combined carbon nanostructures, i.e., conical nanocarbon structures (CNCSs) and single-walled carbon nanotubes (SWNTs). The combined structure was prepared by spray coating of 1,2-dichloroethane (DCE) dispersed SWNTs onto neon ion (Ne+) irradiation induced CNCSs on nafion substrate. The field emission (FE) property of SWCNTs on both flat nafion and CNCSs surfaces increased with increasing the SWCNTs amount. The best FE result was attained for the highest amount of SWCNTs on the CNCSs substrate. This kind of collective structures is found to be effective emitters on transparent and flexible ion-irradiated nafion substrate. Moreover, the combined carbon nanostructures showed improved transparency and emission performance compared to the individual nanostructures. The FE properties of 0.5 ml SWCNTs solution on CNCSs surfaces were equal to those of 1.5 ml SWCNTs solution on flat nafion surface. The hybrid structure based emitters (CNCSs and SWCNTs) produced by this method are lower-cost cathode materials than hybrid structures of SWCNTs and flat nafion. Thus the combined nanostructures of SWCNTs/CNCSs might have huge prospects for the fabrication of efficient transparent and flexible FEEs and their broad application in next-generation portable display devices. ((c) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)

DOI： 10.1002/pssr.201308169

その他リンク： http://orcid.org/0000-0002-4113-5548

Photovoltaic properties of an amorphous carbon/fullerene junction 査読

Tetsuo Soga, Takuya Kondoh, Naoki Kishi, Yasuhiko Hayashi

CARBON 60 1 - 4 2013年8月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：PERGAMON-ELSEVIER SCIENCE LTD

This paper demonstrates all-carbon photovoltaic devices made of amorphous carbon (a-C) and C-60 thin films. C-60 film is deposited by the sublimation in vacuum and a-C film is synthesized by exposing N-2 radicals to C-60 during the deposition. C-60 is converted into a-C when the rf power is larger than 150 Wand the optical band gap decreases with increasing the power. Photovoltaic properties of device with the structure of Al/C-60/a-C/indium tin oxide/glass are presented. It is shown that the present cell has a strong spectral response in the wavelength range shorter than 550 nm and a small response at around 620 nm. (C) 2013 Elsevier Ltd. All rights reserved.

DOI： 10.1016/j.carbon.2013.02.050

その他リンク： http://orcid.org/0000-0002-4113-5548

Study of intercalation compounds using ionic liquids into montmorillonite and their thermal stability 査読

Chisato Takahashi, Takashi Shirai, Yasuhiko Hayashi, Masayoshi Fuji

SOLID STATE IONICS 241 53 - 61 2013年6月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

In the present study, we investigated the direct intercalation of three kinds of ionic liquids (ILs) of different salts (imidazolium and ammonium) and cation sizes into montmorillonite (M) clay, and successfully fabricated the IL intercalated montmorillonite (M-IL) compounds. The peak shifts of the M-IL intercalated compounds in comparison with dried montmorillonite powder as observed by XRD results showed that crystal swelling was significantly influenced by the cation sizes of the ILs. The intercalation behaviors of the M-IL compounds were also compared by TEM and the results are in good agreement with the XRD. The TEM-EDS results further confirmed the intercalation of three types of ILs into the montmorillonite. Based on the cation exchange capacity as measured by ICP and mathematical calculations, the extent of the intercalation and arrangement of cations in the interlayers of the montmorillonite are proposed. The TG-DTA results showed an improved thermal stability of all three kinds of M-IL intercalated compounds, and the XRD indicated that the remaining IL initiates a carbonization process with the montmorillonite at 1000 degrees C. Furthermore, the AC impedance results of the M-IL compounds showed an ionic conductivity. These results suggest the possible application of the M-IL intercalated compounds in electrical conductive films, solar cells, fuel cells, etc. (C) 2013 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.ssi.2013.03.032

その他リンク： http://orcid.org/0000-0002-4113-5548

Phthalocyanine with Trifluoroethoxy Substituents for Organic Solar Cells 査読

Ichiko Yamada, Norihito Iida, Yasuhiko Hayashi, Tetsuo Soga, Norio Shibata

JAPANESE JOURNAL OF APPLIED PHYSICS 52 ( 5 ) 2013年5月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：IOP PUBLISHING LTD

The properties of soluble zinc phthalocyanines with trifluoroethoxy substituents (TFEO-ZnPcs) were studied to evaluate their possible use in organic thin-film solar cells. We prepared five TFEO-ZnPcs with different numbers and positions of the TFEO substituents. The solubilities, UV-visible absorption spectra, and cyclic voltammograms of these ZnPcs varied with their substituents. TFEO-ZnPc thin-films fabricated by spin-casting exhibited photocurrent generation at wavelengths between 600 and 850 nm. Flat heterojunction solar cells consisting of a poly(3-hexylthiophene) (P3HT) layer as a donor and a TFEO-ZnPc layer as an acceptor exhibited photocurrent generation over a wide range of wavelengths corresponding to both the P3HT and TFEO-ZnPc absorption spectra. The best solar cell performance was obtained with (beta-TFEO)(4)ZnPc film. (C) 2013 The Japan Society of Applied Physics

DOI： 10.7567/JJAP.52.05DA07

その他リンク： http://orcid.org/0000-0002-4113-5548

Fabrication of metal nanoparticles from metal-filled carbon nanofibers and their size control by heating 査読

T. Tokunaga, T. Kanematsu, T. Ota, K. Sasaki, T. Yamamoto, Y. Hayashi

IEEE Nanotechnology Materials and Devices Conference, IEEE NMDC 2013 5 - 8 2013年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE Computer Society

In situ environmental transmission electron microscopy (ETEM) observation was used to reveal Sn inside Sn-filled carbon nanofibers (CNFs) during heating. Before and during heating, the Sn was covered completely by CNFs. The volume of Sn present in the Sn-filled CNFs gradually decreased during heating, with new Sn particles appearing at the top of the Sn-filled CNFs. It is thought that Sn diffused out of the Sn-filled CNFs and into the carbon wall of the metal-filled CNFs (MFCNFs). The specific surface area at the top of Sn-filled CNFs is higher specific surface than that at other parts and the temperature at the top of the MFCNF is lower than that at other parts
therefore, diffused Sn particles were formed at only the top of the Sn-filled CNF. Fabrication of Sn metal particles was tried by heating the Sn-filled CNFs, and it was clear that the metal particle size could be controlled by controlling the heating time. © 2013 IEEE.

DOI： 10.1109/NMDC.2013.6707468

その他リンク： http://orcid.org/0000-0002-4113-5548

Synthesis of Continuous Graphene on Metal Foil for Flexible Transparent Electrode Application 査読

Golap Kalita, Koichi Wakita, Masayoshi Umeno, Yasuhiko Hayashi, Masaki Tanemura

PROCEEDINGS OF THE 2013 IEEE 5TH INTERNATIONAL NANOELECTRONICS CONFERENCE (INEC) 281 - 284 2013年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）出版者・発行元：IEEE

We demonstrate synthesis of large area graphene on a metal (Ni and Cu) foil by the thermal chemical vapor deposition (CVD) process using the solid camphor (C10H16O) as a carbon source. The graphene growth process on a polycrystalline metal foil significantly influence by the gas composition and quantity of solid precursor. Synthesis of high quality continuous graphene film is achieved in the developed technique. Fully flexible transparent conductor is fabricated by transferring the graphene film on a plastic substrate.

DOI： 10.1109/INEC.2013.6466023

その他リンク： http://orcid.org/0000-0002-4113-5548

A photoinduced charge transfer composite of graphene oxide and ferrocene 査読

Golap Kalita, Subash Sharma, Koichi Wakita, Masayoshi Umeno, Yasuhiko Hayashi, Masaki Tanemura

PHYSICAL CHEMISTRY CHEMICAL PHYSICS 15 ( 4 ) 1271 - 1274 2013年

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ROYAL SOC CHEMISTRY

We demonstrate the formation of a photoinduced charge transfer composite with graphene oxide (GO) and ferrocene (Fc) molecules. Derived insulating GO was partially reduced to improve the conductivity and modified with the Fc molecules. Transmission electron microscopy (TEM), elemental mapping, X-ray photoelectron and UV-visible spectroscopy studies confirm that the Fc molecules were well grafted to the surface of a GO sheet. Photoresponsivity of the prepared GO-Fc composite was investigated by fabricating a metal/GO-Fc/metal device. The fabricated device shows enhanced current density under light illumination, suggesting a photo-induced charge transfer process in the developed GO-Fc composite.

DOI： 10.1039/c2cp43427j

その他リンク： http://orcid.org/0000-0002-4113-5548

Influence of gas composition on the formation of graphene domain synthesized from camphor 査読

Subash Sharma, Golap Kalita, Ryo Hirano, Yasuhiko Hayashi, Masaki Tanemura

Materials Letters 93 258 - 262 2013年

記述言語：英語掲載種別：研究論文（学術雑誌）

The domain structure of graphene films deposited by the chemical vapor deposition (CVD) process has a great influence on the electrical and physical properties. Here, we tackled the synthesis of increased domain size of single layer and bi-layer graphene along with few-layer graphene on Ni foil using solid camphor as a carbon source. To achieve this, effect of the composition of carrier gas for the evaporated camphor was investigated. Raman mapping and peak width (FWHM) analyses gave the insight of the quality and number of graphene layers. Optical and scanning electron microcopy studies show significance difference in domain structure of the synthesized graphene in different gas atmosphere. As confirmed by optical and scanning electron microscopes, the graphene domain grown with the carrier gas of Ar/H2 mixture was more than 10 times larger than those grown with pure Ar carrier gas. © 2012 Elsevier B.V.

DOI： 10.1016/j.matlet.2012.11.090

その他リンク： http://orcid.org/0000-0002-4113-5548

Synthesis of continuous graphene on metal foil for flexible transparent electrode application 査読

Golap Kalita, Koichi Wakita, Masayoshi Umeno, Yasuhiko Hayashi, Masaki Tanemura

Proceedings - Winter Simulation Conference 281 - 284 2013年

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

We demonstrate synthesis of large area graphene on a metal (Ni and Cu) foil by the thermal chemical vapor deposition (CVD) process using the solid camphor (C10H16O) as a carbon source. The graphene growth process on a polycrystalline metal foil significantly influence by the gas composition and quantity of solid precursor. Synthesis of high quality continuous graphene film is achieved in the developed technique. Fully flexible transparent conductor is fabricated by transferring the graphene film on a plastic substrate. © 2013 IEEE.

DOI： 10.1109/INEC.2013.6466023

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