Papers - YAMAMOTO Masahiro
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Morihiro Saito, Hiromasa Ikuta, Yoshiharu Uchimoto, Masataka Wakihara, Shoichi Yokoyama, Takeshi Yabe, Masahiro Yamamoto
The Journal of Physical Chemistry B 107 ( 42 ) 11608 - 11614 2003.10
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Naoya Nishi, Daisuke Hobara, Masahiro Yamamoto, Takashi Kakiuchi
Langmuir 19 ( 15 ) 6187 - 6192 2003.7
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Influence of Lewis acidic borate ester groups on lithium ionic conduction in polymer electrolytes Reviewed
Yuki Kato, Kentaro Suwa, Hiromasa Ikuta, Yoshiharu Uchimoto, Masataka Wakihara, Shoichi Yokoyama, Takeshi Yabe, Masahiro Yamamoto
Journal of Materials Chemistry 13 ( 2 ) 280 - 285 2003.2
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Naoya Nishi, Daisuke Hobara, Masahiro Yamamoto, Takashi Kakiuchi
The Journal of Chemical Physics 118 ( 4 ) 1904 - 1911 2003.1
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Total-internal-reflection Broad-bandwidth Sum Frequency Generation Spectroscopy of Hexadecanethiol Adsorbed on Thin Gold Film Deposited on CaF2 Reviewed
Naoya NISHI, Daisuke HOBARA, Masahiro YAMAMOTO, Takashi KAKIUCHI
Analytical Sciences 19 ( 6 ) 887 - 890 2003
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Morihiro Saito, Hiromasa Ikuta, Yoshiharu Uchimoto, Masataka Wakihara, Shoichi Yokoyama, Takeshi Yabe, Masahiro Yamamoto
Journal of The Electrochemical Society 150 ( 4 ) A477 - A477 2003
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Takashi Kakiuchi, Hideyuki Usui, Daisuke Hobara, Masahiro Yamamoto
Langmuir 18 ( 13 ) 5231 - 5238 2002.6
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Naoya Nishi, Kazuo Izawa, Masahiro Yamamoto, Takashi Kakiuchi
The Journal of Physical Chemistry B 105 ( 34 ) 8162 - 8169 2001.8
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Reconstruction of Au(111) Following the Reductive Desorption of Self-Assembled Monolayers of 2-Mercaptoethanesulfonic Acid Studied by in Situ Scanning Tunneling Microscopy Reviewed
Daisuke Hobara, Masahiro Yamamoto, Takashi Kakiuchi
Chemistry Letters 30 ( 4 ) 374 - 375 2001.4
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Molecular Dynamics Simulation of the Transfer of a small and a Large Ion Across the NitrobenzenejWater Interface Reviewed
Yamamoto, M, Kakiuchi
Anal. Sci. 17 i239 - i240 2001
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Structure of the Pt(111)/liquid interface: a first-principles/RHNC calculation Reviewed
Masahiro Yamamoto, Masahiro Kinoshita, Takashi Kakiuchi
Electrochimica Acta 46 ( 2-3 ) 165 - 174 2000.11
Joint Work
Authorship:Lead author, Corresponding author Publisher:Elsevier BV
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Daisuke HOBARA, Kazuhiro UEDA, Shin-ichiro IMABAYASHI, Masahiro YAMAMOTO, Takashi KAKIUCHI
Electrochemistry 67 ( 12 ) 1218 - 1220 1999.12
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Position-dependent stopping power of low velocity rare gas atoms at a SnTe(0 0 1) surface Reviewed
Kaoru Nakajima, Yukihiro Fukusumi, Kenji Kimura, Michi-Hiko Mannami, M. Yamamoto, S. Naito
Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms 149 ( 1-2 ) 31 - 37 1999.1
Publisher:Elsevier
Energy losses of 15-30 keV Ne+, Ar+ and Kr+ ions specularly reflected from a SnTe(001) surface are measured. Because more than 98% of the reflected ions are neutral, the observed energy loss can be considered as the result of atom-surface interactions. From the observed energy losses, position-dependent stopping powers of the SnTe(001) surface for neutral atoms are derived. The obtained stopping powers are compared with the theory of the stopping power for low velocity ions with help of the local density approximation. While the agreement between the experimental and theoretical results is excellent for Ar and Kr atoms, the experimental stopping is about twice larger than the theoretical one for Ne atoms. This discrepancy can be explained in terms of the effect of excited atoms on the stopping power. © 1999 Elsevier Science B.V.
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Position-dependent stopping power of low velocity rare gas atoms at a SnTe(001) surface Reviewed
Nucl. Instr. and Meth. B 149 31 - 37 1999
Joint Work
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Electrical resistivity of zirconium hydrides and deuterides at high temperatures Reviewed
A Kaneda, M Yamamoto, S Naito, M Mabuchi, T Hashino
JOURNAL OF PHYSICS-CONDENSED MATTER 10 ( 21 ) 4645 - 4657 1998
Single Work
Publisher:IOP PUBLISHING LTD
Electrical resistivity rho of zirconium hydrides ZrHx and deuterides ZrDx has been measured over the range of hydrogen concentration 0 less than or equal to x < 0.9 (x: H/Zr or D/Zr) and temperature 700 K less than or equal to T less than or equal to 1100 K. It has been found that rho increases linearly with x in the alpha phase and exhibits a parabolic change in the beta phase, shows almost no difference for H and D in the range 0 less than or equal to x < 0.9 and deviates from Matthiessen's rule in the alpha phase. To help discuss the findings, we have made energy band calculations of ZrHx and computed quantities that are closely related to rho. The observed change in rho with x can be explained by assuming that H atoms form independent electron scatterers in the alpha phase and H atom vacancies additionally form electron scatterers in the beta phase. The lack of difference observed in rho for H and D can be explained by the fact that electron-optical phonon coupling constant obtained from the energy band calculations is much smaller than the electron-acoustic phonon coupling constant. It is difficult to give a reasonable explanation of the deviation from Matthiessen's rule only by the energy band calculation result.
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Surface Electron Distribution by Fast Ion-Surface Scattering Reviewed
YAMAMOTO Masahiro
Scanning Microscopy 30 217 1998
Single Work
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High-temperature diffusion of hydrogen and deuterium in titanium and Ti3Al Invited Reviewed
Shizuo Naito, Masahiro Yamamoto, Minoru Doi, Masao Kimura
Journal of the Electrochemical Society 145 ( 7 ) 2471 - 2475 1998
Single Work
Publisher:Electrochemical Society Inc.
Diffusion coefficients (DH and DD) of hydrogen (H) and deuterium (D) in β-titanium (Ti) and β-Ti3Al have been obtained from the rates of gaseous H and D absorption by samples in the temperature ranges of 1173 to 1473 K for β-Ti and 1423 to 1523 K for β-Ti3Al. Activation energies for diffusion (∈d) are found to be 0.26 eV in β-Ti and 0.39 eV in β-Ti3Al, which are smaller than those corresponding to α-Ti and α-Ti3Al. Ratios DD/DH in β-Ti and β-Ti3Al are found to be larger than the classical value, 1/√2, and those in α-Ti and α-Ti3Al. The observed smaller ∈d in β-Ti than in α-Ti is due to the difference between the body-centered cubic structure of β-Ti and the hexagonal close-packed structure of α-Ti and the observed larger DD/DH in β-Ti than in α-Ti due to phonon-assisted jumps of diffusing H atoms in β-Ti. The observed smaller ∈d in β-Ti3Al than in α-Ti3Al can be explained by the body-centered cubic structure of β-Ti3Al and the random distribution of aluminum atoms in it, and the larger DD/DH in β-Ti3Al than in α-Ti, α-Ti3Al, and β-Ti by the presence of aluminum atoms as well as by the phonon-assisted H-atom jumps.
DOI: 10.1149/1.1838662
Other Link: https://iopscience.iop.org/article/10.1149/1.1838662/pdf
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Auger electron spectroscopy and electron energy loss spectroscopy study of the adsorption of nitrogen on a polycrystalline zirconium surface Reviewed
M Kurahashi, M Yamamoto, M Mabuchi, S Naito
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A-VACUUM SURFACES AND FILMS 15 ( 5 ) 2548 - 2552 1997
Single Work
Publisher:AMER INST PHYSICS
Auger electron spectroscopy (AES) and electron energy loss spectroscopy (EELS) were used to investigate the adsorption of nitrogen gas on a polycrystalline zirconium surface at room temperature. it was found that the adsorption of nitrogen is saturated at an exposure of similar to 10 L, the thickness of the nitride formed on the specimen surface is 0.4-0.5 nm at a nitrogen exposure of 100 L, and the surface has the same large electronic density of states 4-5 eV below the Fermi energy as ZrN, The measured AES and EELS spectra are consistent with the electronic structure calculated for the Zr(0001)-(1X1)-N structure. (C) 1997 American Vacuum Society.
DOI: 10.1116/1.580768
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Vibrational Properties of a Polycrystalline Titanium Surface Studied by Electron Energy-Loss Fine Structure(EELFS) Analysis Reviewed
M. Kurahashi, M. Yamamoto, M. Mabuchi, S. Naito
J. Surf. Anal. 3 ( 2 ) 451 - 457 1997
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Theoretical study of nitrogen adsorption on Zr(0001) surface Reviewed
M. Yamamoto, M. Kurahashi, C. T. Chan, K. M. Ho, S. Naito
Surface Science 387 ( 1-3 ) 300 - 311 1997
Single Work
Authorship:Lead author, Corresponding author Publisher:ELSEVIER SCIENCE BV
The chemisorption of nitrogen on the zirconium (0001) surface has been investigated by first-principles total-energy and force calculations. Our results show that nitrogen adsorption at subsurface octahedral sites is energetically more favorable than at surface sites. The calculated binding energy, surface relaxation, work function and electronic structure are in good agreement with available experimental results. © 1997 Elsevier Science B.V.