論文 - 山本 剛久
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Microstructure analysis for zirconium oxynitrides formed in 8 mol% yttria-doped zirconia by a flash event under a direct current electric field in an ambient atmosphere 査読有り
S. Sakamoto, A. Kodaira, T. Tokunaga, N. Morisaki, K. Kobayashi, T. Yamamoto
Journal of the European Ceramic Society 45 巻 ( 7 ) 頁: 117265 2025年7月
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Healing behavior of microcracks on the surface of yttria-stabilized polycrystals using an ultrafast high-temperature sintering method 査読有り
T. Sato, A. Kodaira, T. Tokunaga, K. Morita, T. Yamamoto
Ceramics International 51 巻 ( 4 ) 頁: 4178 - 4184 2025年2月
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Spectrally Narrow Blue-Light Emission from Nonstoichiometric AgGaS2 Quantum Dots for Application to Light-Emitting Diodes 招待有り 査読有り
M. Tozawa, S. Ofuji, M. Tanaka, K. Akiyoshi, T. Kameyama, T. Yamamoto, G. Motomura, Y. Fujisaki, T. Uematsu, S. Kuwabata, T. Torimoto
ACS Applied Materials and Interfaces 16 巻 頁: 68169 - 68180 2024年11月
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Variation of (001) surface structures of strontium titanate single crystals caused by flash event under direct/alternative current electric fields 査読有り
Y. Katsuyama, S. Kayukawa, T. Tokunaga, S. Kobayashi, S. Hidaka, A. Nakamura, T. Yamamoto
Ceramics International 50 巻 頁: 37366 - 37372 2024年10月
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Microstructural analysis of flash-healed Vickers-indented microcracks near positive/negative electrodes on the (001) surface of cubic zirconia single crystals under direct current electric fields 査読有り
S. Kayukawa, Y. Katsuyama, A. Kodaira, T. Tokunaga, K. Morita, T. Yamamoto
Ceramics International 50 巻 頁: 37348 - 37355 2024年10月
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Highly c-axis-oriented apatite-type lanthanum silicate thin films fabricated by magnetron sputtering under bias 査読有り
S. Hidaka, K. Takagi, T. Yamamoto
Materials Chemistry and Physics 326 巻 頁: 129852 2024年8月
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Variation of surface morphology of material uplift near flash-healed Vickers indents under direct-current electric field in cubic zirconia single crystals 査読有り
S. Kayukawa, Y. Katsuyama, T. Tokunaga, T. Yamamoto
Journal of the Ceramic Society of Japan 132 巻 ( 8 ) 頁: 528 - 531 2024年8月
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Pulsed laser deposition and structural analysis of Ba2Ti6O13 epitaxial thin film on the (210) surface of SrTiO3 single crystal 査読有り
R. Kono, K. Hieda, T. Tokunaga, R. Tamura, R. Masamura, Y. Hikita, K. Kano, T. Yamamoto
Applied Physics Express 17 巻 頁: 075503 2024年7月
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The use of He buffer gas for moderating the plume kinetic energy during Nd:YAG-PLD growth of EuXY2-XO3 phosphor films 査読有り
S. Suzuki, T. Dazai, T. Tokunaga, T. Yamamoto, R. Katoh, M. Lippmaa, R. Takahashi
Journal of Applied Physics 135 巻 頁: 195302 2024年5月
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Topographical and morphological changes of the single-crystal (La0.3Sr0.7)(Al0.65Ta0.35)O3 (001) surface treated with high-purity deionized water 査読有り
Y. Tokuda, N. Nishikawa, T. Irimoto, Y. Katsuyama, S. Kobayashi, T. Tokunaga, T. Yamamoto
Surface and Interface Analysis 56 巻 ( 8 ) 頁: 564 - 572 2024年4月
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Optical and mechanical properties of rutile TiO2 subjected to AC flash processing 査読有り
Hiroshi Masuda, Tomoharu Tokunaga, Takahisa Yamamoto, Hidehiro Yoshida
Scripta Materialia 246 巻 頁: 116088 2024年3月
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Non-uniformity of shrinkage rate as a function of current acceleration during flash event under voltage-to-current protocol in 8 mol %Y2O3-ZrO2 査読有り
M. Seko, S. Inagaki, T. Tokunaga, T. Yamamoto
Journal of the Ceramic Society of Japan 132 巻 ( 3 ) 頁: 93 - 98 2024年3月
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Variation of grain boundary dihedral angles caused by voltage-to-current-based flash treatment in fully stabilized yttria-doped zirconia polycrystals 査読有り
M. Seko, S. Kayukawa, S. Inagaki, T. Tokunaga, T. Yamamoto
Journal of the Ceramic Society of Japan 132 巻 ( 2 ) 頁: 63 - 67 2024年2月
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Applying an alternating current to strontium titanate minimizes the change in oxidation state caused by flash sintering 査読有り
M. Seko, S. Inagaki, T. Tokunaga, S. Kobayashi, A. Nakamura, T. Yamamoto
Journal of the European Ceramic Society 44 巻 頁: 2965 - 2971 2023年12月
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One-pot synthesis of Ag–In–Ga–S nanocrystals embedded in a Ga2O3 matrix and enhancement of band-edge emission by Na+ doping 査読有り
M. Tozawa, C. Miyamae, K. Akiyoshi, T. Kameyama, T. Yamamoto, G. Motomura, Y. Fujisaki, T. Uematsu, S. Kuwabata, T. Torimoto
Nanoscale Advances 5 巻 頁: 7057 - 7066 2023年11月
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Near-full compaction within only 30 min of total sintering time by shrinkage-rate-controlled flash sintering in 3 mol% Y2O3-doped ZrO2 polycrystal 査読有り
Yuki ISHINO, Ayu KODAIRA, Tomoharu TOKUNAGA, and Takahisa YAMAMOTO
Journal of the Ceramic Society of Japan 131 巻 ( 10 ) 2023年10月
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Improvements in Flash Sintering for Practical Application 査読有り
Takahisa YAMAMOTO
Materials Transactions 64 巻 ( 9 ) 頁: 2059 - 2068 2023年9月
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StructuralDefectEffecton the ConcentrationQuenchingofTbxY2−xO3PhosphorThin Films 査読有り
Shizuka Suzuki, Takuro Dazai, Tomoharu Tokunaga, Takahisa Yamamoto, Ryuzi Katoh, Ryota Takahashi
J. Phys.Chem.C 127 巻 頁: 9380 - 9387 2023年9月
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Apparent Sintering Activation Energy Estimated by Master Sintering Curves for 8 mol% Y2O3 Doped ZrO2 Polycrystals during Shrinkage-Rate Controlled Flash Sintering 査読有り
Masao KOIKE, Ayu KODAIRA, Tomoharu TOKUNAGA, and Takahisa YAMAMOTO
Materials Transactions 64 巻 ( 9 ) 頁: 2315 - 2320 2023年9月
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Hydrogarnet-Derived Porous Polyhedral Particles of SrFeO3-δ Perovskite 査読有り
H. Otaguro, T. Takeno, R. Sugimoto, S. Hosokawa, H. Akamatsu, T. Yamamoto, K. Nakanishi, K. Hayashi, G. Hasegawa
Chemistry Materials 35 巻 頁: 6423 - 6436 2023年8月
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ナノインデンテーション法を用いた高純度アルミニウム合金の 局所力学特性に及ぼす添加元素の影響解明 査読有り
寺崎保裕, 望月喬史, 小畠淳平, 山本剛久, 瀧川順庸
日本金属学会誌 87 巻 ( 7 ) 頁: 219 - 225 2023年7月
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PromotingOxygenReductionReactionby ExcitationofLocalizedSurfacePlasmonof Shape-and Facet-ControlledOctahedralAu@PtCore-ShellNanocrystals 査読有り
Tatsuya Kameyama, Kentaro Sato, Takahisa Yamamoto, Mamoru Tamura, Takuya Iida, Tatsuya Shoji, Yasuyuki Tsuboi, Tsukasa Torimoto
ChemElectroChem 10 巻 頁: e202300182 2023年7月
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Flash healing of Vickers microcracks formed on the (001) surface of cubic zirconia single crystals 査読有り
Shunsuke KAYUKAWA, Yutaro KATSUYAMA, Ayu KODAIRA, Tomoharu TOKUNAGA, Koji MORITA, Atsutomo NAKAMURA, and Takahisa YAMAMOTO
Journal of the European Ceramic Society 43 巻 頁: 6272 - 6278 2023年6月
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Scanning electron microscopy observation in wide field of view for SrO/TiO2-terminated step-terrace structure formed on SrTiO3 (001) single crystal surface 査読有り
utaro KATSUYAMA, Ayu KODAIRA, Tomoharu TOKUNAGA, and Takahisa YAMAMOTO
Journal of the Ceramic Society of Japan 131 巻 ( 5 ) 頁: 135 - 139 2023年5月
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Development of Cu–In–Ga–S quantum dots with a narrow emission peak for red electroluminescence 査読有り
Chang Jiang, Makoto Tozawa, Kazutaka Akiyoshi, Tatsuya Kameyama, Takahisa Yamamoto, Genichi Motomura, Yoshihide Fujisaki, Taro Uematsu, Susumu Kuwabata, Tsukasa Torimoto
Journal of Chemical Physics 158 巻 頁: 164708 2023年4月
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Microstructure and tensile strength of electrodeposited Fe-rich bcc FeCoNi medium-entropy alloy 査読有り
A. Watanabe, T. Yamamoto, R. Miyamoto, Y. Takigawa
Materials Science and Technology 2023年3月
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Non-uniformity of shrinkage rate as a function of current acceleration during flash event under voltage-to-current protocol in 8 mol%Y2O3–ZrO2 査読有り
M. Seko, S. Inagaki, T. Tokunaga, T. Yamamoto
Journal of the Ceramic Society of Japan 132 巻 ( 3 ) 頁: 93 - 98 2023年3月
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Effect of Initial Grain Size on Crack Healing Behavior under DC Electric Field of Zirconia (8Y-CSZ) Ceramic 査読有り
S. Takahashi, K. Morita, K. Nambu, D. Terada, K. Kobayashi, T. Tokunaga, T. Yamamoto
Advanced Engineering Materials 頁: 220180 2023年2月
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Local crystallization of amorphous AlOx thin film using electron beam irradiation by SEM 査読有り
T. Tokunaga, S. Tanahashi, S. Okawara, T. Yamamoto
Materials Transactions 64 巻 ( 1 ) 頁: 184 - 190 2023年1月
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フラッシュ焼結技術の改良と実用化への展望 査読有り
山本 剛久
70 巻 頁: 18 - 29 2023年1月
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Shrinkage-rate controlled flash sintering for 3 - 10 mol%Y2O3-doped ZrO2 polycrystals 査読有り
M. KOIKE, A. KODARIA, T. TOKUNAGA, T. YAMAMOTO
Journal of the Ceramic Society of Japan 130 巻 ( 12 ) 頁: 906 - 912 2022年12月
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A technique to modify the photoluminescence intensity of β-Ga2O3 polycrystals using an electric field during sintering 査読有り
R. ONO, A. Kodaira, T. TOKUNAGA, H. YOSHIDA, T. YAMAMOTO
Journal of Luminescence 254 巻 頁: 119508 2022年11月
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Shell-like structure to limit further densification formed during flash sintering under alternative current electric field for 8mol%Y2O3-doped ZrO2 査読有り
M. Seko, K. Hattori, Y. Ishino, A. Kodaira, T. Tokunaga, T. Yamamoto
Journal of the Ceramic Society of Japan 130 巻 ( 11 ) 頁: 895 - 898 2022年11月
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Microcrack healing in single-crystal cubic zirconia by thermal annealing 招待有り 査読有り
S. Kayukawa, Y. Katsuyama, A. Kodaira, T. Tokunaga, K. Morita, A. Nakamura, K. Higuchi, T. Yamamoto
Journal of the European Ceramic Society 2022年10月
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Flash self-joining of Y-TZP ceramics assisted with an ACelectric field 査読有り
K. Nambu, T. Kitaoka, K. Morita, K. Soga, T. Tokunaga, T. Yamamoto, H. Masuda, H. Yoshida
Journal of the American Ceramic Society 106 巻 頁: 2073 - 2082 2022年10月
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He buffer gas effect on Nd:YAG-PLD growth of EuxY2−xO3 phosphor thin films 招待有り 査読有り
S. Suzuki, T. Dazai, K. Kawashima, T. Tokunaga, T. Yamamoto, R. Takahashi
ACS Applied Electronics Materials 4 巻 頁: 4419 - 4426 2022年8月
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Microstructure and tensile strength of electrodeposited Fe-rich bcc FeCoNi medium-entropy alloys 査読有り
A. Watanabe,T. Yamamoto,R. Miyamoto, Y. Takigawa
Materials Science and Technology 39 巻 ( 15 ) 頁: 2028 - 2034 2022年8月
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Effect of electron beam irradiation in gas atmosphere during ETEM 査読有り
T. Tokunaga, T. Kawakami, K. Higuchi, Y. Yamamoto, T. Yamamoto
Micron 158 巻 頁: 103289 2022年7月
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Variation of photoluminescence intensity depending on the timing of electric field application during isothermal flash sintering for 3mol%Y2O3-ZrO2 polycrystal 査読有り
A. Itoh, T. Tokunaga, A. Kodaira, H. Yoshida, T. Yamamoto
Ceramics International 48 巻 頁: 28712 - 28717 2022年6月
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Tensile strength of nanocrystalline FeCoNi medium-entropy alloy fabrication using electrodeposition 査読有り
A. Watanabe, T. Yamamoto, Y. Takigawa
Scientific Reports 12 巻 頁: 12076 2022年6月
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Estimation of excess oxygen-vacancy formed by direct-current electric field during flash sintering for 3 mol%–10 mol% Y2O3-doped ZrO2 査読有り
N. Morisaki, T. Tokunaga, K. Kobayashi, A. Kodaira, T. Yamamoto
Ceramic International 48 巻 頁: 12091 - 12097 2022年5月
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A first attempt of automated shrinkage-rate control flash sintering using a current profile without feedback of shrinkage behavior for 8mol%Y2O3-doped ZrO2 査読有り
M. Koike, Y. Ishino, T. Tokunaga, T. Yamamoto
Journal of the Ceramic Society of Japan 130 巻 ( 4 ) 頁: 327 - 330 2022年4月
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Anelasticity induced by AC flash processing of cubic zirconia 査読有り
H. Masuda, K. Morita, T. Tokunaga, T. Yamamoto, H. Yoshida
Acta Materialia 227 巻 頁: 117704 2022年2月
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Electrode Overvoltage Model for a Flash State of Yttria-Stabilized Zirconia: Validity, Limitation, and Open New Issue 査読有り
K. Kobayashi, T. Yamamoto, K. Morita, T. S. Suzuki
Journal of the Ceramic Society of Japan 130 巻 ( 1 ) 頁: 172 - 179 2022年1月
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Densification of Y2O3 by flash sintering under an AC electric field 査読有り
Kohta Nambu, Koji Morita, Kohei Soga, Takahisa Yamamoto, Hiroshi Masuda, Hidehiro Yoshida
Journal of the European Ceramic Society 42 巻 頁: 567 - 575 2021年11月
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Direct determination of a topmost atomic layer of (100) surfaces on (La0.3Sr0.7)(Al0.65Ta0.35)O3 single crystals annealed in air by high-resolution scanning transmission electron microscopy 査読有り
Y. Tokuda, T. Irimoto, N. Nishikawa, Y. Katsuyama, S. Kobayashi, T. Tokunaga, and T. Yamamoto
Surface and Interface Analysis 54 巻 ( 11 ) 頁: 212 - 217 2021年11月
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Photoluminescence property of quinary Ag-(In,Ga)-(S,Se) quantum dots with a gradient alloy structure for in vivo bioimaging 査読有り
Nurmanita Rismaningsih, Hiroki Yamauchi, Tatsuya Kameyama, Takahisa Yamamoto, Saho Morita, Hiroshi Yukawa, Taro Uematsu, Yoshinobu Baba, Susumu Kuwabata, Tsukasa Torimoto
Journal of Materials Chemistry C 9 巻 ( 37 ) 頁: 12791 - 12801 2021年8月
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Rapid sintering of 3 mol% Y2O3-doped ZrO2 by a combined rapid furnace heating and shrinkage-controlled flash sintering protocol 査読有り
Yuki ISHINO, Kimihiro TAGUCHI, Ayu KODAIRA, Tomoharu TOKUNAGA, Takahisa YAMAMOTO
Journal of the Ceramic Society of Japan 129 巻 ( 8 ) 頁: 551 - 554 2021年8月
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He Buffer Gas for Moderating the Kinetic Energy of Pulsed Laser Deposition Plumes 査読有り
Ryota Takahashi, Takahisa Yamamoto, Mikk Lippmaa
Crystal Growth & Design 21 巻 ( 9 ) 頁: 5017 - 5026 2021年7月
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Near complete densification of flash sintered 8YSZ: controlled shrinkage rate effects 査読有り
Kimihiro TAGUCHI, Yuki ISHINO, Tomoharu TOKUNAGA, Takahisa YAMAMOTO
Journal of the European Ceramic Society 41 巻 ( 8 ) 頁: 4567 - 4571 2021年7月
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Shrinkage rate control during a flash state by current-ramping for 3mol%Y2O3-doped ZrO2 polycrystals 査読有り
Yuki ISHINO, Kimihiro TAGUCHI, Masao KOIKE, Tomoharu TOKUNAGA, Takahisa YAMAMOTO
Journal of the American Ceramic Society 104 巻 ( 10 ) 頁: 4960 - 4967 2021年5月
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Electric current dependence of plastic flow behavior with large tensile elongation in tetragonal zirconia polycrystal under a DC field 査読有り
Yamato Sasaki, Koji Morita, Takahisa Yamamoto, Kohei Soga, Hiroshi Masuda, Hidehiro Yoshida
Scripta Materialia 194 巻 頁: 113659 2021年3月
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Constant shrinkage rate control during a flash event for 8 mol%Y2O3-doped ZrO2 polycrystals 査読有り
Kimihiro TAGUCHI, Yuki ISHINO, Tomoharu TOKUNAGA, Takahisa YAMAMOTO
Journal of the Ceramic Society of Japan 129 巻 ( 3 ) 頁: 204 - 207 2021年3月
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Nanopillar composite electrodes for solar‑driven water splitting 査読有り
Mikk Lippmaa, Seiji Kawasaki, Ryota Takahashi, Takahisa Yamamoto
MRS BULLETIN 46 巻 ( 2 ) 頁: 142 - 151 2021年2月
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セラミックスにおける強電界ナノダイナミクス 査読有り
吉田英弘,増田紘士,森田孝治,山本剛久
まてりあ 60 巻 ( 1 ) 頁: 19 - 24 2021年1月
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Power dissipation behaviors during SCF-sintering for 8 mol% Y2O3-doped ZrO2 査読有り
Yuki ISHINO, Kimihiro TAGUCHI, Ayu KODAIRA, Tomoharu TOKUNAGA, Takahisa YAMAMOTO
Journal of the Japan Society of Powder and Powder Metallurgy 68 巻 ( 11 ) 頁: 482 - 486 2021年
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Cross-sectional area dependency of shrinkages and grain sizes in flash sintered 3mol%Y2O3-ZrO2 polycrystals at direct and alternating electric current fields 査読有り
Tsuyoshi KURACHI, Kiyoshi KOBAYASHI, Tomoharu TOKUNAGA, Takahisa YAMAMOTO
Journal of the Japan Society of Powder and Powder Metallurgy 68 巻 ( 11 ) 頁: 487 - 493 2021年
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Flash sintering for BaTiO3 with square alternating current field including zero-field duration 査読有り
Umemura, R; Tokunaga, T; Yamamoto, T
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN 128 巻 ( 12 ) 頁: 1018 - 1023 2020年12月
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フラッシュ焼結の学理構築と革新的焼結技術への展開(受賞解説論文平成 30 年度研究進歩賞) 招待有り 査読有り
山本 剛久, 吉田 英弘
Journal of Lapanese Society of Powder and Powder Metallurgy 67 巻 ( 11 ) 頁: 593 - 600 2020年11月
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Controlling the visible-light driven photocatalytic activity of alloyed ZnSe-AgInSe(2)quantum dots for hydrogen production 査読有り
Hsieh, PY; Kameyama, T; Takiyama, T; Masuoka, K; Yamamoto, T; Hsu, YJ; Torimoto, T
JOURNAL OF MATERIALS CHEMISTRY A 8 巻 ( 26 ) 頁: 13142 - 13149 2020年8月
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Controlling the oxidation state of molybdenum oxide nanoparticles prepared by ionic liquid/metal sputtering to enhance plasmon-induced charge separation 査読有り
Akiyoshi, K; Kameyama, T; Yamamoto, T; Kuwabata, S; Tatsuma, T; Torimoto, T
RSC ADVANCES 10 巻 ( 48 ) 頁: 28516 - 28522 2020年8月
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Blue photo luminescence from 3 mol%Y2O3-doped ZrO2 polycrystals sintered by flash sintering under an alternating current electric field 査読有り
Y. Yamashita, T. Kurachi, T.Tokunaga, H. Yoshida, T. Yamamoto
Journal of the European Ceramic Society 40 巻 頁: 2072 - 2076 2020年6月
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Doping effect on the flash sintering of Y2O3: Promotion of densification and optical translucency 査読有り
H. Yoshidaa, H. Hayasaka, K. Soga, K. Morita, B.N. Kim, T. Yamamoto
Journal of the European Ceramic Society 40 巻 頁: 6053 - 6060 2020年6月
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Suppression of nitridation of yttria-doped zirconia during flash sintering 査読有り
Kurachi, T; Yamashita, Y; Tokunaga, T; Yoshida, H; Yamamoto, T
Journal of the American Ceramic Society 103 巻 ( 5 ) 頁: 3002 - 3007 2020年5月
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H2 production from methane decomposition by fullerene at low temperature 査読有り
T. Tokunaga, K. Kuno, T. Kawakami, T. Yamamoto, A. Yoshigoe
International Journal of Hydrogen Energy 45 巻 頁: 14347 - 14353 2020年4月
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Blue photoluminescence at room temperature from Y2O3-doped ZrO2 polycrystals sintered by flash sintering 査読有り
Yamashita, Y; Itoh, A; Tokunaga, T; Yoshida, H; Yamamoto, T
APPLIED PHYSICS EXPRESS 13 巻 ( 2 ) 頁: 35506 2020年3月
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Tailored Photoluminescence Properties of Ag(In,Ga)Se-2 Quantum Dots for Near-Infrared In Vivo Imaging 査読有り
Kameyama, T; Yamauchi, H; Yamamoto, T; Mizumaki, T; Yukawa, H; Yamamoto, M; Ikeda, S; Uematsu, T; Baba, Y; Kuwabata, S; Torimoto, T
ACS APPLIED NANO MATERIALS 3 巻 ( 4 ) 頁: 3275 - 3287 2020年3月
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Noble metal clustering and nanopillar formation in an oxide matrix 査読有り
Lippmaa, M; Kawasaki, S; Takahashi, R; Yamamoto, T
JAPANESE JOURNAL OF APPLIED PHYSICS 59 巻 ( 1 ) 頁: 10501 2020年1月
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Microstructural heterogeneity in the electrodeposited Ni: insights from growth modes 査読有り
Matsui, I; Watanabe, A; Takigawa, Y; Omura, N; Yamamoto, T
Scientific Reports 10 巻 ( 1 ) 頁: 5548 2020年1月
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Photoluminescence properties of undoped and Si4+-doped polycrystalline Y2O3 phosphors prepared by flash-sintering 査読有り
Nambu, K; Hayasaka, H; Yamamoto, T; Yoshida, H
APPLIED PHYSICS EXPRESS 12 巻 ( 7 ) 頁: 75504 2019年12月
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Technique to control specimen electric current during a flash state with alternating current electric fields 査読有り
Yamashita, Y; Kurachi, T; Tokunaga, T; Yoshida, H; Yamamoto, T
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN 127 巻 ( 11 ) 頁: 849 - 851 2019年11月
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Core Nanoparticle Engineering for Narrower and More Intense Band-Edge Emission from AgInS2/GaSx Core/Shell Quantum Dots 査読有り
Hoisang, W; Uematsu, T; Yamamoto, T; Torimoto, T; Kuwabata, S
NANOMATERIALS 9 巻 ( 12 ) 頁: 1763 2019年9月
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Mechanical properties and microstructures after abnormal grain growth in electrodeposited Ni-W alloys 査読有り
Matsui, I; Watanabe, A; Uesugi, T; Omura, N; Takigawa, Y; Yamamoto, T
MATERIALIA 8 巻 - 100481 2019年8月
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Local Structure of High Performance TiOx Electron-Selective Contact Revealed by Electron Energy Loss Spectroscopy 査読有り
T. Mochizuki, K. Gotoh, Y. Kurokawa, T. Yamamoto, N. Usami
Advanced Materials Interfaces 6 巻 ( 3 ) 頁: 1801645 2019年6月
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Direct observation of strain-stored grains in electrodeposited nanocrystalline Ni-W alloys by low-angle annular dark field diffraction contrast imaging 査読有り
Matsui, I; Takigawa, Y; Yamamoto, T
SCRIPTA MATERIALIA 166 巻 頁: 29 - 33 2019年2月
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Removal of carbon contamination in ETEM by introducing Ar during electron beam irradiation 査読有り
Tokunaga, T; Saito, K; Kuno, K; Higuchi, K; Yamamoto, Y; Yamamoto, T
JOURNAL OF MICROSCOPY 273 巻 ( 1 ) 頁: 46 - 52 2019年1月
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Wavelength-Tunable Band-Edge Photoluminescence of Nonstoichiometric Ag-In-S Nanoparticles via Ga3+ Doping 査読有り
Kameyama, T; Kishi, M; Miyamae, C; Sharma, DK; Hirata, S; Yamamoto, T; Uematsu, T; Vacha, M; Kuwabata, S; Torimoto, T
ACS APPLIED MATERIALS & INTERFACES 10 巻 ( 49 ) 頁: 42844 - 42855 2018年10月
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Narrow band-edge photoluminescence from AgInS2 semiconductor nanoparticles by the formation of amorphous III-VI semiconductor shells 査読有り
T. Uematsu, K. Wajima, D. Kumar Sharma, S. Hirata, T. Yamamoto, T. Kameyama, M. Vacha, T. Torimoto, S. Kuwabata
NPG Asia Materials 10 巻 頁: 713-726 2018年10月
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フラッシュ焼結による 酸化物セラミックスの 製造とその関連技術 招待有り 査読有り
吉田英弘、山本剛久
セラミックス 53 巻 ( 9 ) 頁: 591-594 2018年9月
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電析バルクナノ結晶 Ni 合金における 粒界安定性と機械的特性の関係 査読有り
松井 功, 尾村 直紀, 山本 剛久, 瀧川 順庸
まてりあ 57 巻 ( 10 ) 頁: 479-486 2018年8月
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フラッシュ焼結によるセラミックスの緻密化~電界下の物質輸送の素過程~ 招待有り 査読有り
山本 剛久、小林 哲朗、吉田 英弘
65 巻 ( 10 ) 頁: 646-653 2018年7月
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Topotactic Synthesis of Mesoporous 12CaO·7Al2O3 Mesocrystalline Microcubes toward Catalytic Ammonia Synthesis 査読有り
G. Hasegawa, S. Moriya,M. Inada,M. Kitano,M. Okunaka, T. Yamamoto,Y. Matsukawa, K. Nishimi,K. Shima,N. Enomoto,S. Matsuishi, H. Hosono, K. Hayashi
Chem. Mater. 30 巻 頁: 4498−4502 2018年7月
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Rod-shaped Zn-Ag-In-Te nanocrystals with wavelength-tunable band-edge photoluminescence in the near-IR region 査読有り
T. Kameyama, K. Sugiura, Y. Ishigami, T. Yamamoto, S. Kuwabata, T. Okuhata, N. Tamai, T. Torimoto
Journal of Materials Chemistry C 6 巻 頁: 2034--2042 2018年6月
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Effect of low-temperature annealing on tensile behavior of electrodeposited bulk nanocrystalline Ni-W alloys 査読有り
Matsui, I; Yamamoto, T; Omura, N; Takigawa, Y
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 709 巻 頁: 241 - 246 2018年5月
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酸化物系セラミックのフラッシュ焼結と 今後の進展 招待有り 査読有り
山本 剛久、吉田 英弘
まてりあ 57 巻 ( 8 ) 頁: 373-380 2018年4月
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Production of transparent yttrium oxide ceramics by the combination of low temperature spark plasma sintering and zinc cation-doping 査読有り
Journal of the European Ceramic Society 38 巻 ( 4 ) 頁: 1972-1980 2018年4月
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Intergranular amorphous films formed by DC electric field in pure zirconia 査読有り
N. Morisaki, H. Yoshida, T. Kobayashi, T. Tokunaga, T. Yamamoto
Journal of the American Ceramic Society 101 巻 頁: 3282-3287 2018年2月
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Multiphase nanodomains in a strained BaTiO3 film on a GdScO3 substrate 査読有り
S.Kobayashi, K.Inoue, T.Kato, Y.Ikuhara, T.Yamamoto
Journal of Applied Physics 123 巻 頁: 06402 2018年2月
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Enhanced Photocatalytic Activity of Zn-Ag-In-S Semiconductor Nanocrystals with a Dumbbell-Shaped Heterostructure 査読有り
T. Kameyama, S. Koyama, T. Yamamoto, S. Kuwabata, T. Torimoto
J. Phys. Chem. C 122 巻 ( 25 ) 頁: 13705-13715 2018年1月
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Electrodeposition with intermittent addition of trimethylamine borane to produce ductile bulk nanocrystalline Ni-B alloys 査読有り
I. Matsui, N. Omura, T. Yamamoto, Y. Takigawa
Surface & Coatings Technology 337 巻 頁: 411-417 2018年1月
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Directly determining the polarity of WC grains in WC-12wt%Co alloy by ABF-STEM 査読有り
Y. Hayashi, T. Tokunaga, K. Sasaki, T. Yamamoto
Inter. J. Refract. Met. Hard Mater. 62 巻 頁: 9 - 13 2017年10月
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Microstructure analysis of IrO2 thin films 査読有り
X. Houa, R. Takahashi, T. Yamamoto, M. Lippmaaa
Journal of Crystal Growth 462 巻 頁: 24 - 28 2017年5月
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Consolidation of undoped, monoclinic zirconia polycrystals by flash sintering 査読有り
N. Morisaki, H. Yoshida, T. Tokunaga, K. Sasaki, T. Yamamoto
J. Am. Ceram. Soc. 100 巻 頁: 3851-3857 2017年4月
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Methane decomposition for hydrogen production by catalytic activity of 査読有り
T. Tokunaga, N. Kishi, K. Yamakawa, K. Sasaki, T. Yamamoto
Journal of the Ceramic Society of Japan 125 巻 ( 4 ) 頁: 185-189 2017年4月
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Electric current-controlled synthesis of BaTiO3 査読有り
Y. Nakagawa, H. Yoshida, A. Uehashi, T. Tokunaga, K. Sasaki, T. Yamamoto
J. Am. Ceram. Soc. 100 巻 頁: 3843-3850 2017年4月
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Single step preparation of indium tin oxide nanocrystals dispersed in ionic liquids via oxidation of molten In Sn alloys 査読有り
D. Sugioka, T. Kameyama, T. Yamamoto, S. Kuwabata, T. Torimoto
Chem. Commun. 52 巻 頁: 12241-12244 2016年11月
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Formation of a Pt-Decorated Au Nanoparticle Monolayer Floating on an Ionic Liquid by the Ionic Liquid/Metal Sputtering Method and Tunable Electrocatalytic Activities of the Resulting Monolayer 査読有り
D.Sugioka, T. Kameyama, S. Kuwabata, T. Yamamoto, T. Torimoto
ACS Appl. Mater. Interfaces 8 巻 ( 17 ) 頁: 10874–10883 2016年8月
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Reduction in sintering temperature for flash-sintering of yttria by nickel cation-doping 査読有り
H. Yoshida, K. Morita, BN. Kim, Y. Sakka, T. Yamamoto
106 巻 ( 5 ) 頁: 344–352 2016年5月
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Formation of grain boundary second phase in BaTiO3 polycrystal under a high DC electric field at elevated temperatures 査読有り
H. Yoshida, A. Uehashi, T. Tokunaga, K. Sasaki, T. Yamamoto
J. Ceram. Soc. Jpn. 124 巻 ( 4 ) 頁: 388-392 2016年4月
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Direct observation of B-site ordering in LSAT: (La0.3Sr0.7)(Al0.65Ta0.35)O3 single crystal 査読有り
S. Okada, S. Kobayashi, K. Ohashi, N. Nishikawa, T. Tokunaga, K. Sasaki, T. Yamamoto
Appl. Phys. Lett. 108 巻 頁: 4 2016年
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Synthesis of zirconium oxynitride in air under DC electric fields 招待有り 査読有り
N. Morisaki, H. Yoshida, K. Matsui, T. Tokunaga, K. Sasaki, T. Yamamoto
Appl. Phys. Lett. 109 巻 頁: 083104 2016年
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Photoelectrochemical water splitting enhanced by self-assembled metal nanopillars embedded in an oxide semiconductor photoelectrode 査読有り
S. Kawasaki, R. Takahashi, T. Yamamoto, M. Kobayashi, H. Kumigashira, J. Yoshinobu, F. Komori, A. Kudo, M. Lippmaa
Nature Communications 7 巻 頁: 11818 2016年
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High Electron Mobility of Nb-Doped SrTiO3 Films Stemming from Rod-Type Sr Vacancy Clusters 査読有り
S. Kobayashi, Y. Mizumukai, T. Ohnishi, N. Shibata, Y. Ikuhara and T. Yamamoto
Sr Vacancy Clusters 9 巻 ( 11 ) 頁: 10769 2015年11月
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Controlling the Electronic Energy Structure of ZnS-AgInS2 Solid Solution Nanocrystals for Photoluminescence and Photocatalytic Hydrogen Evolution 査読有り
119 巻 ( 44 ) 頁: 24740-24749 2015年11月
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Carbon content dependence of grain growth mode in VC-doped WC-Co hardmetals 査読有り
I. Sugiyama, Y. Mizumukai, T. Taniguchi, K. Okada, T. Tanase, Y. Ikuhara and T. Yamamoto
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 52 巻 頁: 245 2015年6月
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Enhancement of sintering rates in BaTiO3 by controlling of DC electric current 査読有り
A. Uehashi, H. Yoshida, T. Tokunaga, K. Sasaki, T. Yamamoto
J. Ceram.Soc. Jpn. 123 巻 ( 6 ) 頁: 465-468 2015年6月
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Assessment of Strain-Generated Oxygen Vacancies Using SrTiO3 Bicrystals 査読有り
SY. Choi, SD Kim, M. Choi, HS Lee, J. Ryu, N. Shibata, T. Mizoguchi, E. Tochigi, T. Yamamoto, SJL. Kang, Y. Ikuhara
Nano Lett. 15 巻 ( 6 ) 頁: 4129–4134 2015年6月
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In situ observation of carbon nanotube yarn during voltage application 査読有り
T. Tokunaga, Y. Hayashi, T. Iijima, Y. Uesugi, M. Unten, K. Sasaki, T. Yamamoto
Micron 74 巻 頁: 30–34 2015年5月
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Ultrathin oxide shell coating of metal nanoparticles using ionic liquid/metal sputtering 査読有り
T. Torimoto, Y. Ohta, K. Enokida, D. Sugioka, T. Kameyama, T. Yamamoto, T. Shibayama, K. Yoshii, T. Tsudac, S. Kuwabata*
Journal of Materials Chemistry A 3 巻 頁: 6177-6186 2015年3月
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Spatially-resolved mapping of history-dependent coupled electrochemical and electronical behaviors of electroresistive NiO 査読有り
I. Sugiyama, Y. Kim, S. Jesse, E. Strelcov, A. Kumar, A. Tselev, E. Rahani, T. Yamamoto, N. Shibata, Y. Ikuhara
Scientific reports 4 巻 2014年10月
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Spontaneous Growth of Strain-Free Magnetite Nanocrystals via Temperature-Driven Dewetting 査読有り
R. Takahashi, H. Misumi, T. Yamamoto, M. Lippmaa
Cryst. Growth Design 14 巻 ( 3 ) 頁: 1264-1271 2014年5月
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Densification behavior and microstructural development in undoped yttria prepared by flash-sintering 査読有り
H. Yoshidaa, Y. Sakkaa, T. Yamamoto, JM Lebrun, R. Raj
J. Euro. Ceram. Soc. 34 巻 ( 4 ) 頁: 991-1000 2014年4月
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Fabrication of tin-filled carbon nanofibres by microwave plasma vapour deposition and their in situ heating observation by environmental transmission electron microscopy 査読有り
T. Tokunaga, T. Kanematsu, T. Ito, T. Ota, Y. Hayashi, K. Sasaki, T. Yamamoto
Nanoscale Research Letters 8 巻 ( 302 ) 2013年8月
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Atomistic study of abnormal grain growth structure in BaTiO3 by transmission electron microscopy and scanning transmission electron microscopy 査読有り
SJ. Zheng, XL. Ma, T. Yamamoto, Y. Ikuhara
ACTA MATERIALIA 61 巻 ( 7 ) 頁: 2298-2307 2013年7月
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Effect of local coordination of Mn on Mn-L-2,L-3 edge electron energy loss spectrum 査読有り
S. Nishida, S. Kobayashi, A. Kumamoto, H. Ikeno, T. Mizoguchi, I. Tanaka, Y. Ikuhara, T. Yamamoto
114 巻 ( 5 ) 頁: 054906 2013年5月
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Ferromagnetic dislocations in antiferromagnetic NiO 査読有り
I. Sugiyama, N. Shibata, Z. Wang, S. Kobayashi, T. Yamamoto and Y. Ikuhara
NATURE NANOTECHNOLOGY 8 巻 頁: 266-270 2013年4月
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Unusual 90 degrees domain structure in (2/3)Bi(Zn1/2Ti1/2)O-3-(1/3)BiFeO3 epitaxial films with giant 22% tetragonal distortion 査読有り
S. Yasui, K. Yazawa, M. Matsushima, T. Yamada, H. Morioka, H. Uchida, T. Iijima, L. You, JL. Wang, T. Yamamoto, Y. Ikuhara, H. Funakubo
APPLIED PHYSICS LETTERS 103 巻 ( 4 ) 頁: 042904 2013年4月
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Periodic Nanowire Array at the Crystal Interface 査読有り
A. Nakamura, T. Mizoguchi, K. Matsunaga, T. Yamamoto, N. Shibata, Y. Ikuhara
ACS NANO 7 巻 ( 7 ) 頁: 6297-6302 2013年1月
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Labyrinth-type domain structure of heteroepitaxial SrMnO2.5 film 査読有り
S. Kobayashi, Y. Ikuhara, T. Yamamoto
APPLIED PHYSICS LETTERS 102 巻 ( 23 ) 頁: 231911 2013年1月
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Doping effect on sinterability of polycrystalline yttria: From the viewpoint of cation diffusivity 査読有り
H. Yoshida, M. Kodo, K. Soga and T. Yamamoto
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY ( 32 ) 頁: 3103-3114 2012年9月
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Simultaneous visualization of oxygen vacancies and the accompanying cation shifts in a perovskite oxide by combining annular imaging techniques 査読有り
S. Kobayashi, SD. Findlay, N. Shibata, T. Mizoguchi, Y. Sato, E. Okunishi, Y. Ikuhara and T. Yamamoto
APPLIED PHYSICS LETTERS 100 巻 ( 19 ) 頁: 193112 2012年5月
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Formation of (W,V)Cx layers at the WC/Co interfaces in the VC-doped WC-Co cemented carbide 査読有り
I. Sugiyama, Y. Mizumukai, T. Taniuchi, K. Okada, F. Shirase, T. Tanase, Y. Ikuhara and T. Yamamoto
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 30 巻 ( 1 ) 頁: 185-187 2012年1月
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Characterization and atomic modeling of an asymmetric grain boundary 査読有り
H. S. Lee, T. Mizoguchi, T. Yamamoto, S. J. L. Kang and Y. Ikuhara
Physical Review B 84 巻 ( 19 ) 頁: 195319 2011年