研究者詳細 - 伊藤　恵司

論文 - 伊藤　恵司

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SAXS and SANS observations of abnormal aggregation of human •-crystallin 査読

Masaaki Sugiyama, Norihiko Fujii, Yukio Morimoto, Keiji Itoh, Kazuhiro Mori, Toshiharu Fukunaga, Noriko Fujii

Chemistry and Biodiversity 7 ( 6 ) 1380 - 1388 2010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：Wiley-VCH Verlag

Aggregation states of human α-crystallins are observed complementarily using small-angle X-ray and small-angle neutron scatterings (SAXS and SANS). Infant α-crystallin is almost a monodispersed system of the aggregates with gyration radius of ca. 60 Å, which is a normal aggregate. On the other hand, the aged and cataract α-crystallins have not only the normal but also the larger aggregates. In the aged alpha
-crystallin, the normal aggregate is a major component, but in the cataract α-crystallin the larger ones are dominant. Both αA- and alpha
B-crystallins, which are subunits of α-crystallin, also form an aggregate with the size close to the normal aggregate. Under UV irradiation, only aggregates of αB-crystallin undergo further aggregation. Therefore, considering increase of ratio of αB-crystallin in the aggregate of alpha
-crystallin as aging, the abnormal aggregation (formation of the huge aggregates) mainly results in the further aggregation of alpha
B-crystallin caused by external stresses. © 2010 Verlag Helvetica Chimica Acta AG.

DOI： 10.1002/cbdv.200900332

Newly designed neutron diffraction cell for fluids at high temperatures and high pressures 査読

Hiroki Iwase, Nobuyuki Matubayasi, Yasuo Kameda, Keiji Itoh, Toshiya Otomo, Masaru Nakahara

Japanese Journal of Applied Physics 49 ( 1 ) 2010年

記述言語：英語掲載種別：研究論文（学術雑誌）

A high-pressure and high-temperature cell for neutron diffraction experiments on fluids is developed. The new cell is made of Ti-Zr null-alloy (34% titanium and 66% zirconium) so that the average scattering length for neutrons can be made to be zero. Experimental variables as high pressure and high temperature can be finely controlled for fluids using a known equation of state by setting the cell in a standard IR image furnace. The simple system requires no high pressure-generating and -controlling units. © The Japan Society of Applied Physics.

DOI： 10.1143/JJAP.49.016602

SANS investigation of assembly state of proteasome activator 28 and the 20S proteasome 査読

Masaaki Sugiyama, Eiji Kurimoto, Hiroki Sahashi, Eri Sakata, Yukio Morimoto, Keiji Itoh, Kazuhiro Mori, Toshiharu Fukunaga, Yasufumi Minami, Koichi Kato

Journal of Physics: Conference Series 247 2010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：Institute of Physics Publishing

The state of proteasome activator 28 (PA28) and the formation of the proteasomal complex in an aqueous solution are investigated with small-angle neutron scattering (SANS). The most appropriate state of PA28, which well reproduces the observed SANS profile, is the dissociation equilibrium between dimer and monomer with dissociation degree of 0.5. In addition, it is revealed that the packing of PA28 in the dimer is same as that in a crystal. It is also revealed that the proteasomal complex in which two PA28s connects to both basal planes of the 20S proteasome is spontaneously formed in the mixture solution of PA28 and the 20S proteasome. © 2010 IOP Publishing Ltd.

DOI： 10.1088/1742-6596/247/1/012020

Microstructure of hydrogenated Mg2Ni studied by SANS 査読

K. Mori, M. Sugiyama, K. Iwase, S. Kawabe, Y. Onodera, K. Itoh, T. Otomo, T. Fukunaga

Journal of Physics: Conference Series 247 2010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：Institute of Physics Publishing

X-ray powder diffraction (XRD) and small-angle neutron scattering (SANS) experiments were carried out for the hydrogenated and duterated Mg 2Ni, respectively. According to the results of XRD experiments, both of them coexisted with unhydrogenated (or undeuterated) Mg2Ni in the hydrogen absorbing cycle. Furthermore, in the SANS experiments, a slope of SANS curve, I(Q), was roughly evaluated by using the following power law: I(Q) Q -m, where Q is the magnitude of the scattering vector, and m can be equated with a fractal dimensionality, DS (= 6 - m). In conclusion, the hydrogenated and duterated Mg2Ni showed DS∼ 3 and ∼ 2, respectively. The significant difference between DS's can be understood by considering the scattering length densities, ρ, of Mg 2Ni, Mg2NiH4, and Mg2NiD 4. © 2010 IOP Publishing Ltd.

DOI： 10.1088/1742-6596/247/1/012036

Ionic conductivity and structural properties of lithium lanthanum titanate quenched into liquid nitrogen studied by neutron powder diffraction 査読

Kazuhiro Mori, Kenji Iwase, Masao Yonemura, Joan Siewenie, Thomas Proffen, Yohei Onodera, Keiji Itoh, Masaaki Sugiyama, Takashi Kamiyama, Toshiharu Fukunaga

Journal of the Physical Society of Japan 79 84 - 86 2010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：Physical Society of Japan

For 7Li-enriched La2/3-x 7Li 3xTiO3 samples quenched into liquid nitrogen and cooled in the furnace, impedance measurements and time-of-flight neutron powder diffraction (TOF-NPD) experiments were carried out in order to study the effect of the quenched-into-liquid-nitrogen treatment for the ionic conduction and the structural properties. It was found that the quenched-into-liquid-nitrogen treatment enhances the lithium ionic conductivity in the 7Li-content range between 3x ∼ 0.25 and 0.45. Furthermore, the local structure within 6 Å did not change, according to the atomic pair density function (PDF) analysis. © 2010 The Physical Society of Japan.

DOI： 10.1143/JPSJS.79SA.84

Ionic conductivity and structural properties of lithium lanthanum titanate quenched into liquid nitrogen studied by neutron powder diffraction 査読

K. Mori, K. Iwase, M. Yonemura, J. Siewenie, T. Proffen, Y. Onodera, K. Itoh, M. Sugiyama, T. Kamiyama, T. Fukunaga

Journal of the Physical Society of Japan 79 ( SUPPL. A ) 84 - 86 2010年

Assembly State of Proteasome Activator 28 in an Aqueous Solution as Studied by Small-Angle Neutron Scattering

Masaaki Sugiyama, Eiji Kurimoto, Yukio Morimoto, Hiroki Sahashi, Eri Sakata, Kei Hamada, Keiji Itoh, Kazuhiro Mori, Toshiharu Fukunaga, Yasufumi Minami, Koichi Kato

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 78 ( 12 ) 2009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：PHYSICAL SOC JAPAN

The characterization of quaternary structures of proteins in solution remains challenging, especially for those undergoing dynamic changes. Small-angle neutron scattering (SANS) is a potentially powerful method for addressing this issue with little perturbation resulting from irradiation damage. However, it is usually difficult to determine the three-dimensional (3D) structure of protein complexes at the atomic level on the basis of only SANS data. To cope with this difficulty, we developed a novel approach combining 3D homology modeling with SANS profile simulation, in which whole simulated SANS profiles were examined together with experimental SANS data. We herein demonstrate the feasibilty of our strategy using proteasome activator 28 (PA28) as a model system. PA28 is a hetero-oligomeric protein composed of homologous alpha- and beta-subunits. Although the crystal structure of the homoheptameric ring of alpha-subunits (PA28 alpha(7)) has been reported, the physiologically relevant hetero-oligomeric structure remains to be elucidated. On the basis of the PA28 alpha(7) structure, we performed homology modeling to build hypothetical quaternary structures of the PA28 hetero-oligomer. By analyzing the SANS data of a PA28 mutant lacking a mobile loop in its alpha-subunit, we successfully revealed that alpha- and beta-subunits form heteroheptameric rings, about half of which are stacked back to back to form a double-ring structure. Thus, our SANS approach provides in-depth information on the assembly states of protein subunits in aqueous solutions.

DOI： 10.1143/JPSJ.78.124802

Heating rate dependence of Tg and Tx in Zr-based BMGs with characteristic structures 査読

E. Matsubara, T. Ichitsubo, K. Itoh, T. Fukunaga, J. Saida, N. Nishiyama, H. Kato, A. Inoue

Journal of Alloys and Compounds 483 ( 1-2 ) 8 - 13 2009年8月

記述言語：英語掲載種別：研究論文（学術雑誌）

Heating rate dependence of glass transition and crystallization temperatures is applicable for evaluation of glass structural stability and also for discussion on the apparent activation energies for glass transition and crystallization. The glass-structure stabilities of the Zr-based BMGs (Zr50Cu40Al10, Zr70Cu20Al10 and Zr70Ni20Al10) and the conventional amorphous alloys (Zr70Cu30 and Zr70Ni30) are assessed by the densely packed glass structure as well as the complicated crystallization process. By the reverse Monte Carlo (RMC) simulation with X-ray and neutron diffraction data, it is shown that the densely packed structure is built by icosahedron-like clusters. In Zr65Al7.5Ni10Pd17.5 and Zr65Al7.5Ni10Cu17.5, the effect of Pd atoms on the glass structure is also described. © 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jallcom.2008.07.225

Structural study on Zr0.39Ni0.61 and (Zr0.39Ni0.61)D0.59 amorphous alloys by neutron and X-ray diffraction 査読

K. Itoh, T. Watanabe, T. Otomo, M. Sugiyama, K. Mori, T. Fukunaga

Journal of Alloys and Compounds 483 ( 1-2 ) 213 - 216 2009年8月

記述言語：英語掲載種別：研究論文（学術雑誌）

Neutron and X-ray diffraction and reverse Monte Carlo (RMC) simulation were performed on Zr0.39Ni0.61 and (Zr0.39Ni0.61)D0.59 amorphous alloys to investigate the rearrangement of metal atoms due to the deuterium absorption. The RMC models showed that the Zr-Zr distances slightly increase but the Zr-Ni and Ni-Ni distances remain virtually unchanged after the deuterium absorption. Additionally, the Voronoi polyhedral analysis of the RMC configurations showed that there is not much difference in the local structure around Zr and Ni between Zr0.39Ni0.61 and (Zr0.39Ni0.61)D0.59 amorphous alloys. © 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jallcom.2008.07.150

Structural investigation on supercritical carbon dioxide and its mixture with alcohol 査読

Takashi Sato, Masaaki Sugiyama, Masakatsu Misawa, Kei Hamada, Keiji Itoh, Kazuhiro Mori, Toshiharu Fukunaga

Journal of Molecular Liquids 147 ( 1-2 ) 102 - 106 2009年7月

記述言語：英語掲載種別：研究論文（学術雑誌）

Small-angle neutron scattering (SANS) experiments were carried out for three different systems, pure CO2, CO2 + methanol (1 mol%) and CO2 + ethanol (1 mol%), along the isotherm of 311.15 K in their supercritical states. All the SANS profiles were well analyzed with Ornstein-Zernike equation. With addition of the alcohols, the maximum values of the correlation length, ξ, and the scattering intensity at Q = 0, I(0), became larger, and the pressure at which ξ and I(0) became maxima was shifted to be lower. These changes can be explained qualitatively with van der Waals equation of state by regarding CO2 + alcohol mixture as a system consisting of a single kind of virtual molecules. From this analysis, both the molecular attractive interaction and volume are suggested to be increased in the mixture. These changes were considered to be strongly connected with the increase of solubility and selectivity on entrainer effect. © 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.molliq.2008.06.017

Crystal structure of Fe-doped lanthanum gallate for oxygen partial pressures studied by neutron powder diffraction 査読

Kazuhiro Mori, Ryoji Kiyanagi, James W. Richardson Jr., Joe Fieramosca, Yohei Onodera, Keiji Itoh, Masaaki Sugiyama, Takashi Kamiyama, Toshiharu Fukunaga

Solid State Ionics 180 ( 6-8 ) 541 - 545 2009年5月

記述言語：英語掲載種別：研究論文（学術雑誌）

Neutron powder diffraction experiments were carried out to investigate a change in a crystal structure of La0.8Sr0.2Ga0.65Fe0.35O3 for oxygen partial pressures, PO2, at 800 °C. The crystal structure was refined on the basis of the R3̄c symmetry for the PO2 range from 10- 1 to 10- 20 atm, by the Rietveld analysis. It was found that lattice parameters, a and c, monotonically expand with decreasing PO2, and then both expansions are rapidly suppressed below 10- 4 atm. In the meantime, lM-O and lO-O(2) also discontinuously increased with decreasing PO2, while lO-O(1) did not change at all PO2, where lM-O, lO-O(1) and lO-O(2) are the bond lengths within a MO6 octahedron (M = Ga0.65Fe0.35). This result indicates that the lM-O and the lO-O(2) are more important than the lO-O(1) for such a complicated lattice expansion for PO2. © 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.ssi.2008.07.001

Structure-property relationships of fast copper ion conductor cubic CuI 査読

D. S. Adipranoto, F. Shikanai, M. Yonemura, K. Mori, J. G. Park, K. Itoh, T. Kamiyama

SOLID STATE IONICS 180 ( 6-8 ) 492 - 496 2009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：ELSEVIER SCIENCE BV

Structure-property relationships of fast copper ion conductor cubic gamma-CuI (300 K) and alpha-CuI (773 K) has been investigated using the time-of-flight (TOF) neutro powder diffraction over the Q-range up to 30 angstrom(-1). Crystal structure of the both gamma- and alpha-phases were refined using the conventional Rietveld methods combined with the maximum-entropy-method (MEM), whilst the local structures were analyzed by means of the pair distribution function (PDF) combined with the reverse Monte Carlo (RMC) simulation. The crystal structure analysis revealed temperature dependence of large thermal displacement of copper ions along < 111 > directions, with average copper ions density mostly distributed at the 8c center of tetrahedrally-coordinated by 1 ions. The PDF analysis estimated the new peak position of Cu-Cu pairs shifted from 4.27 A in the gamma-phase to 2.49 A in the alpha-phase and estimation of coordination number decreases from 12.1 to 5.8, respectively. The local structure analysis found the new split peaks of g(Cu-Cu)(r) at r about 2.47 angstrom and 2.72 angstrom in the alpha-phase that roughly correspond to the Cu-Cu diagonally distance between nearest neighboring tetrahedral corner 32f-32f sites and between tetrahedral center 8c-32f sites such as represented by the splitting Cu site model of Fm-3m. (C) 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.ssi.2008.09.025

Structure of Na2S-GeS2 glasses studied by using neutron and X-ray diffraction and reverse Monte Carlo modeling 査読

Keiji Itoh, Toshiharu Fukunaga

Solid State Ionics 180 ( 4-5 ) 351 - 355 2009年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

Neutron and X-ray diffraction measurements were performed to investigate the structure of Na2S-GeS2 glasses synthesized by mechanical alloying. The Ge-S coordination numbers calculated from the total correlation functions show that GeS4 tetrahedra form the basic framework structure of Na2S-GeS2 glasses. In addition, a three-dimensional structural model of the (Na2S)50(GeS2)50 glass was obtained by using reverse Monte Carlo (RMC) simulation on neutron and X-ray diffraction data, and it was compared with the RMC model previously obtained for a (Li2S)50(GeS2)50 glass. The results show that the Ge-S framework structures in the two glasses are almost the same in the short and intermediate ranges
that is, the Ge-S framework structures are formed mainly by the connection of corner-sharing GeS4 tetrahedra. Many of the Na ions are coordinated by four S atoms, which are non-bridging S atoms and/or bridging S atoms. © 2009 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.ssi.2009.01.008

Structural study of amorphous LaNi5Dx: In situ neutron and X-ray diffraction experiments in deuterium gas 査読

K. Itoh, T. Shoumura, M. Sugiyama, K. Mori, T. Fukunaga

Journal of Alloys and Compounds 474 ( 1-2 ) 4 - 8 2009年4月

記述言語：英語掲載種別：研究論文（学術雑誌）

In situ neutron and X-ray diffraction measurements at various D2 pressures up to 2.28 MPa were performed on amorphous LaNi5Dx prepared by mechanical alloying in D2 gas. Reverse Monte Carlo (RMC) simulation based on the neutron and X-ray diffraction data was performed to construct a three-dimensional atomic model of these amorphous alloys. The RMC models show that more than 90% of the deuterium atoms occupy tetrahedral sites consisting of La and/or Ni atoms. Moreover, most occupy the 2Ni + 2La and 3Ni + La tetrahedral sites. © 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jallcom.2008.06.044

SANS simulation of aggregated protein in aqueous solution 査読

Masaaki Sugiyama, Kei Hamada, Koichi Kato, Eiji Kurimoto, Kenta Okamoto, Yukio Morimoto, Susumu Ikeda, Sachio Naito, Michihiko Furusaka, Keiji Itoh, Kazuhiro Mori, Toshiharu Fukunaga

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 600 ( 1 ) 272 - 274 2009年2月

記述言語：英語掲載種別：研究論文（学術雑誌）

Small-angle neutron scattering (SANS) of aggregated protein in an aqueous solution is simulated based on the crystallographic data of the protein. After obtaining the crystallographic data of the target protein, hydrogen atoms are added to the data and then some hydrogen atoms are replaced with deuterium atoms. The structure models are made with this data and then their gyration radii and SANS intensities are calculated. Compared the calculated SANS data with the experimental one, the most probable structure is determined. With this analysis method, the aggregate structure of proteasome α7-subunit (PRSα) in an aqueous solution was investigated. Three structural models, a simple monomer and two types of dimers, were supposed as the aggregated structure of PRSα. The analysis showed that the best compromised structure was the dimer, which was consistent with electron microscopy observation. © 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2008.11.121

Structural and electrochemical properties of La0.8Sr0.2Ga1-xFexO3 査読

Kazuhiro Mori, Yohei Onodera, Ryoji Kiyanagi, James W. Richardson Jr., Keiji Itoh, Masaaki Sugiyama, Takashi Kamiyama, Toshiharu Fukunaga

Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 600 ( 1 ) 328 - 331 2009年2月

記述言語：英語掲載種別：研究論文（学術雑誌）

Mixed ionic-electronic conductor of Fe doped lanthanum gallate, La0.8Sr0.2Ga1-xFexO3, has been studied by the dc four-probe method and the neutron powder diffraction. In the electrical conductivity measurement at RT, insulator-metal transition-like phenomenon was observed at around x∼0.35
this suggests an existence of the percolation limit for the electronic conductivity. Simultaneously, a bond length between O atoms, lO-O, in a MO6 octahedron (M{double bond, long}Ga1-xFex) drastically expands over x∼0.4, according to the result of crystal structure refinement based on the hexagonal phase. Such a drastic expansion in the lO-O would induce the decrease in the oxygen ionic conductivity. © 2008 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.nima.2008.11.084

Comprehensive structural study of glassy and metastable crystalline BaTi<inf>2</inf>O<inf>5</inf>

Jianding Yu, Shinji Kohara, Keiji Itoh, Shunsuke Nozawa, Satoru Miyoshi, Yasutomo Arai, Atsunobu Masuno, Hiraki Taniguchi, Mitsuru Itoh, Masaki Takata, Toshiharu Fukunaga, Shin Ya Koshihara, Yoshihiro Kuroiwa, Shinichi Yoda

Chemistry of Materials 21 ( 2 ) 259 - 263 2009年1月

掲載種別：研究論文（学術雑誌）

The structures of glassy and metastable crystalline BaTi2O5 fabricated by the containerless method were comprehensively investigated by combined X-ray and neutron diffractions, XANES analyses, and computer simulations. The three-dimensional atomic structure of glassy BaTi 2O5 (g-BaTi2O5), simulated by Reverse Monte Carlo (RMC) modeling on diffraction data, shows that extremely distorted TiO5polyhedra interconnected with both corner- and edge-shared oxygen formed a higher packing density structure than that of conventional silicate glass linked with only corner-sharing of SiO4 polyhedra. In addition, XANES measurement revealed that five-coordinated TiO5 polyhedra were formable in the crystallized metastable α- and β-BaTi2O5 phases. The structure of metastable β-BaTi2O5 was solved by ab initio calculation, and refined by Rietveld refinement as group Pnma with unit lattices a = 10.23784(4) A, b = 3.92715(1) A, c = 10.92757(4) A. Our results show that the glass-forming ability enhanced by containerless processing, not by "strong glass former", fabricated new bulk oxide glasses with novel structures and properties. © 2009 American Chemical Society.

DOI： 10.1021/cm802483w

Chemically oxidized γ-MnO2 for lithium secondary batteries: Structure and intercalation/deintercalation properties 査読

Won Il Jung, Miki Nagao, Cédric Pitteloud, Keiji Itoh, Atsuo Yamada, Ryoji Kanno

Journal of Materials Chemistry 19 ( 6 ) 800 - 806 2009年

記述言語：英語掲載種別：研究論文（学術雑誌）

Structural changes of chemically lithiated γ-MnO2 during chemical oxidation were characterized by X-ray diffraction combined with a stacking fault analysis and neutron total scattering with a local structure analysis. Lithium ions intercalate into the crystallographic sites around "Ruetschi" protons prior to those around "Coleman" protons for the chemically lithiated γ-MnO2. The "Ruetschi" and "Coleman" protons have O-H bond lengths of 1.2 A° and 1.9 A°, respectively, which decreased after the chemical oxidation. The chemically intercalated lithium ions are placed at the center of oxygen octahedra with an O-Li length of 1.9 A°. © The Royal Society of Chemistry 2009.

DOI： 10.1039/b812683f

Structure of Mg50Ni50 amorphous alloy studied by using X-ray diffraction and reverse Monte Carlo modelling 査読

K. Itoh, T. Otomo, M. Sugiyama, K. Mori, T. Fukunaga

Journal of Physics: Conference Series 144 2009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 Physics Publishing

X-ray diffraction measurement was performed on an Mg50Ni 50 amorphous alloy prepared by mechanical alloying under an Ar atmosphere. Reverse Monte Carlo (RMC) simulation based on the X-ray diffraction data was used to construct a three-dimensional atomic arrangement of the amorphous alloy. In addition, the local environments around the Mg and Ni atoms were investigated by using Voronoi polyhedral analysis on the RMC configuration. The results show that isosahedral structures are predominant around the Mg and Ni atoms in Mg50Ni50, although prismatic local structures are present around some of the Ni atoms. © 2009 IOP Publishing Ltd.

DOI： 10.1088/1742-6596/144/1/012107

Evaluation of the local environment for nanoscale quasicrystal formation in Zr80Pt20 glassy alloy using Voronoi analysis 査読

Junji Saida, Keiji Itoh, Shigeo Sato, Muneyuki Imafuku, Takashi Sanada, Akihisa Inoue

Journal of Physics Condensed Matter 21 ( 37 ) 2009年

記述言語：英語掲載種別：研究論文（学術雑誌）

The local atomic structure of nano-quasicrystal-forming Zr 80Pt20 binary glassy alloy was investigated by reverse Monte Carlo modeling based on the results of x-ray diffraction. A prepeak at Q∼17nm-1 originating from the unique bonding between the Pt-Pt pair is observed in the structure factor. Voronoi analysis indicates that an icosahedral-like polyhedron is formed around Pt. It is also found that icosahedral-like polyhedra exist around Zr
however, the fraction of perfect icosahedra is considerably lower than that in the nano-quasicrystalforming Zr70Pd30 glassy alloy. A difference in the local environment between the two binary quasicrystal-forming glassy alloys is suggested. © 2009 IOP Publishing Ltd.

DOI： 10.1088/0953-8984/21/37/375104

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