Organization
Undergraduate School School of Science and Technology Associate Professor
Title
Associate Professor
External link
Research Areas
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Nanotechnology/Materials / Inorganic materials
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Nanotechnology/Materials / Inorganic compounds/materials chemistry
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Nanotechnology/Materials / Crystal engineering
Education
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Tokyo Institute of Technology Interdisciplinary Graduate School of Science and Engineering Department of Electronic Chemistry
2008.4 - 2011.3
Country/Region： Japan
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Tokyo Institute of Technology Interdisciplinary Graduate School of Science and Engineering Department of Materials Science and Engineering
2006.4 - 2008.3
Country/Region： Japan
Research History
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Meiji University School of Science and Technology Department of Applied Chemistry Associate Professor
2023.4
Country/Region：Japan
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Meiji University School of Science and Technology Department of Applied Chemistry Senior Assistant Professor
2016.4 - 2023.3
Country/Region：Japan
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Shinshu University Faculty of Engineering, Department of Environmental Science and Technology Assistant Professor
2012.4 - 2016.3
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University of Konstanz Special researcher of the Japan Society for the Promotion of Science
2011.5 - 2012.3
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Tokyo Institute of Technology Materials and Structures Laboratory Special researcher of the Japan Society for the Promotion of Science
2011.4 - 2011.5
Professional Memberships
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無機マテリアル学会
2021
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日本結晶成長学会
2013
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日本フラックス成長研究会
2012
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応用物理学会
2012
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日本MRS
2009
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日本セラミックス協会
2006
Papers
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Selective synthesis of β-TaON: The critical influence of oxygen partial pressure in ammonolysis
Mirabbos Hojamberdiev, Ronald Vargas, Lorean Madriz, Dilshod Nematov, Ulugbek Shaislamov, Hajime Wagata, Yuta Kubota, Kunio Yubuta, Katsuya Teshima, Nobuhiro Matsushita
Dalton Transactions 54 ( 29 ) 11193 - 11206 2025
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Ginji Harada, Mirabbos Hojamberdiev, Tomoaki Watanabe, Kitaru Suzuki, Hajime Wagata
CrystEngComm 27 ( 6 ) 775 - 783 2025
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Masaki Yoshioka, Takuya Okazaki, Suzumi Enjo, Hajime Wagata, Hideki Kuramitz, Tomoaki Watanabe
ANALYTICAL SCIENCES 39 ( 2 ) 203 - 211 2023.2
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Growth of submillimeter SrTaO2N single crystals by an NH3-assisted SrCl2 flux method
Ginji Harada, Ryosuke Sinmyo, Shuhou Maitani, Tomoaki Watanabe, Mirabbos Hojamberdiev, Kitaru Suzuki, Hajime Wagata
Dalton Transactions 2023
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Non-seed chemical bath deposition of ZnO films in a rotating continuous flow reactor with various carboxylic acids and their application to transparent conductive films
Hajime Wagata, Naoya Shioiri, Yuya Tanaka, Ryo Yokogawa, Atsushi Ogura
CRYSTENGCOMM 24 ( 47 ) 8294 - 8302 2022.12
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Detoxifying SARS-CoV-2 antiviral drugs from model and real wastewaters by industrial waste-derived multiphase photocatalysts
Mirabbos Hojamberdiev, Bozena Czech, Anna Wasilewska, Anna Boguszewska-Czubara, Kunio Yubuta, Hajime Wagata, Shahlo S. Daminova, Zukhra C. Kadirova, Ronald Vargas
JOURNAL OF HAZARDOUS MATERIALS 429 2022.5
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Growth of Lanthanum Iron Oxide Crystals from a Sodium Molybdate Flux Reviewed
Hajime Wagata, Jumpei Nishiwaki, Marina Ishiwata
Journal of the Society of Inorganic Materials, Japan 29 73 - 78 2022.3
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Hajime Wagata, Ginji Harada, Eriko Nakashima, Motoki Asaga, Tomoaki Watanabe, Yuya Tanaka, Masaru Tada, Kunio Yubuta
CrystEngComm 23 ( 47 ) 8367 - 8378 2021.10
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Takuya Okazaki, Hiroaki Taniguchi, Hajime Wagata, Mizuki Ito, Hideki Kuramitz, Tomoaki Watanabe
Electroanalysis 32 ( 8 ) 1681 - 1688 2020.8
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Hajime Wagata, Minori Yanai, Daewook Kim, Sayaka Suzuki, Mirabbos Hojamberdiev, Kunio Yubuta, Chiaki Terashima, Katsuya Teshima
CrystEngComm 22 ( 35 ) 5723 - 5730 2020
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Alkali Metal Chloride Flux Growth of Ilmenite-Type ZnTiO<inf>3</inf> and Subsequent Nitrogen Doping for Visible-Light-Driven Water Oxidation Catalysis Reviewed
Hajime Wagata, Kenta Sakakibara, Kenta Kawashima, Mirabbos Hojamberdiev, Kunio Yubuta, Katsuya Teshima
ACS Applied Energy Materials 2 ( 11 ) 7762 - 7771 2019.11
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Effects of UV irradiation on the electrical and optical properties of solution-processed transparent ZnO films Reviewed
Hwai-En Lin, Jeong-Soo Hong, Ryosuke Nitta, Yuta Kubota, Yuta Katayanagi, Hajime Wagata, Tetsuo Kishi, Tetsuji Yano, Nobuhiro Matsushita
Applied Surface Science 489 135 - 141 2019.9
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Liquid-phase atomic layer deposition of crystalline hematite without post-growth annealing Reviewed
Asako Taniguchi, Takaaki Taniguchi, Hajime Wagata, Ken-ichi Katsumata, Kiyoshi Okada, Nobuhiro Matasushita
CRYSTENGCOMM 21 4184 - 4191 2019.6
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Template-Assisted Size Control of Polycrystalline BaNbO2N Particles and Effects of Their Characteristics on Photocatalytic Water Oxidation Performances Reviewed
Tetsuya Yamada, Yukinori Murata, Sayaka Suzuki, Hajime Wagata, Shuji Oishi, Katsuya Teshima
Journal of Physical Chemistry C 122 ( 15 ) 8037 - 8044 2018.4
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Ta3N5 photoanodes fabricated by providing NaCl-Na2CO3 evaporants to Ta subsrtate surface under NH3 atmosphere Reviewed
Sayaka Suzuki, Minori Yanai, Tetsuya Yamada, Hajime Wagata, Yutaka Sasaki, Shuji Oishi, Kazunari Domen, Katsuya Teshima
ACS Applied Energy Materials 1 ( 11 ) 6129-6135 2018
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Understanding the effect of partial N3--to-O2- substitution and H+-to-K+ exchange on photocatalytic water reduction activity of Ruddlesden-Popper layered perovskite KLaTiO4 Reviewed
Kenta Kawashima, Mirabbos Hojamberdiev, Shanshan Chen, Kunio Yubuta, Hajime Wagata, Kazunari Domen, Katsuya Teshima
MOLECULAR CATALYSIS 432 250 - 258 2017.5
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Protonated Oxide, Nitrided, and Reoxidized K2La2Ti3O10 Crystals: Visible-Light-Induced Photocatalytic Water Oxidation and Fabrication of Their Nanosheets Reviewed
Kenta Kawashima, Mirabbos Hojamberdiev, Hajime Wagata, Kunio Yubuta, Kazunari Domen, Katsuya Teshima
ACS SUSTAINABLE CHEMISTRY & ENGINEERING 5 ( 1 ) 232 - 240 2017.1
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Two-step synthesis and visible-light-driven photocatalytic water oxidation activity of AW(O,N)3 (A=Sr,La,Pr,Nd and Eu) perovskites Reviewed
Kenta Kawashima, Mirabbos Hojamberdiev, Hajime Wagata, Ehsan Zahedi, Kunio Yubuta, Shuji Oishi, Kazunari Domen, Katsuya Teshima
Journal of Catalysis 344 29-37 - 37 2016.12
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Exceptional Flux Growth and Chemical Transformation of Metastable Orthorhombic LiMnO2 Cuboids into Hierarchically-Structured Porous H1.6Mn1.6O4 Rods as Li Ion Sieves Reviewed
Fumitaka Hayashi, Shoichi Kurokawa, Hiromasa Shiiba, Hajime Wagata, Kunio Yubuta, Shuji Oishi, Hiromasa Nishikiori, Katsuya Teshima
CRYSTAL GROWTH & DESIGN 16 ( 11 ) 6178 - 6185 2016.11
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Facile growth of centimeter-order, highly crystalline ZnWO4 single crystals by the flux evaporation technique using molten NaCl Reviewed
Tetsuya Yamada, Yuta Sukegawa, Hajime Wagata, Kunio Yubuta, Katsuya Teshima
CRYSTENGCOMM 18 ( 44 ) 8608 - 8613 2016.9
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Crystal structure and photoelectric conversion properties of eosin Y-adsorbing ZnO films prepared by electroless deposition Reviewed
Satoshi Nagaya, Hiromasa Nishikiori, Hideaki Mizusaki, Kosuke Sato, Hajime Wagata, Katsuya Teshima
APPLIED CATALYSIS B-ENVIRONMENTAL 189 51 - 55 2016.7
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The cross-substitution effect of tantalum on visible-light-driven water oxidation activity of BaNbO2N crystals grown directly by an NH3-assisted flux method
Mirabbos Hojamberdiev, Hajime Wagata, Ehsan Zahedi, Kenta Kawashima, Kunio Yubuta, Shuji Oishi, Kazunari Domen, Katsuya Teshima
Journal of Materials Chemistry A 4 ( 33 ) 12807-12817 - 12817 2016.6
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Low temperature Solution-Processed ZnO film on flexible substrate Reviewed
JeongSoo Hong, Hajime Wagata, Ken-ichi Katsumata, Nobuhiro Matsushita
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING 47 20 - 24 2016.6
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The contrasting effect of the Ta/Nb ratio in (111)-layered B-site deficient hexagonal perovskite Ba5Nb4−xTaxO15 crystals on visible-light-induced photocatalytic water oxidation activity of their oxynitride derivatives Reviewed
Mirabbos Hojamberdiev, Maged F. Bekheet, Ehsan Zahedi, Hajime Wagata, Junie Jhon, M. Vequizo, Akira Yamakata, Kunio Yubuta, Aleksander Gurlo, Kazunari Domen, Katsuya Teshima
Dalton Trans. 45 ( 31 ) 12559 - 12568 2016.6
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Facile morphological modification of Ba5Nb4O15 crystals using chloride flux and in-situ growth investigation
Tetsuya Yamada, Yukinori Murata, Hajime Wagata, Kunio Yubuta, Katsuya Teshima
Crystal Growth & Design 16 ( 7 ) 3954-3960 2016.5
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Flux-boosted coating of idiomorphic CuInS2 crystal layer on Mo-coated glass substrate
Masaaki Kurihara, Fumitaka Hayashi, Kosuke Shimizu, Hajime Wagata, Toshiyuki Hirano, Yasuhiro Nakajima, Hiromasa Nishikiori, Shuji Oishi, Kazunari Domen, Katsuya Teshima
CrystEngComm 18 ( 20 ) 3612-3616 - 3616 2016.4
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New Dion-Jacobson Phase Three-Layer Perovskite CsBa2Ta3O10 and Its Conversion to Nitrided Ba2Ta3O10 Nanosheets via a Nitridation-Protonation-Intercalation-Exfoliation Route for Water Splitting Reviewed
Mirabbos Hojamberdiev, Maged F. Bekheet, Ehsan Zahedi, Hajime Wagata, Yuuki Kamei, Kunio Yubuta, Aleksander Gurlo, Nobuhiro Matsushita, Kazunari Domen, Katsuya Teshima
CRYSTAL GROWTH & DESIGN 16 ( 4 ) 2302 - 2308 2016.4
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KCl flux-induced growth of isometric crystals of cadmium-containing early transition-metal (Ti4+, Nb5+, and Ta5+) oxides and nitridability to form their (oxy)nitride derivatives under an NH3 atmosphere for water splitting application Reviewed
Mirabbos Hojamberdiev, Hajime Wagata, Kunio Yubuta, Kenta Kawashima, Junie Jhon M. Vequizo, Akira Yamakata, Shuji Oishi, Kazunari Domen, Katsuya Teshima
APPLIED CATALYSIS B-ENVIRONMENTAL 182 626 - 635 2016.3
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Flux-Boosted Sulfide Crystal Growth: Growth of CuInS2 Crystals by NaCl-InCl3 Evaporation Reviewed
Masaaki Kurihara, Fumitaka Hayashi, Kosuke Shimizu, Hajime Wagata, Toshiyuki Hirano, Yasuhiro Nakajima, Kunio Yubuta, Shuji Oishi, Katsuya Teshima
CRYSTAL GROWTH & DESIGN 16 ( 3 ) 1195 - 1199 2016.3
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Amount of tungsten dopant influencing the photocatalytic water oxidation activity of LaTiO2N crystals grown directly by an NH3-assisted KCl flux method
Kenta Kawashima, Mirabbos Hojamberdiev, Hajime Wagata, Kunio Yubuta, Shuji Oishi, Kazunari Domen, Katsuya Teshima
Catalysis Science & Technology 6 ( 14 ) 5389-5396 - 5396 2016.3
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BaNbO2N結晶層/Nb集電極のフラックスコーティング作製と界面観察 Reviewed
鈴木清香, 我田元, 嶺岸耕, 堂免一成, 大石修治, 手嶋勝弥
J Flux Growth 10 ( 2 ) 73 2015.12
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Unique Growth Manner of Li5La3Ta2O12 Crystals from Lithium Hydroxide Flux at Low Temperature Reviewed
Xiong Xiao, Hajime Wagata, Fumitaka Hayashi, Hitoshi Onodera, Kunio Yubuta, Nobuyuki Zettsu, Shuji Oishi, Katsuya Teshima
CRYSTAL GROWTH & DESIGN 15 ( 10 ) 4863 - 4868 2015.10
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Transparent ZnO Films Deposited by Aqueous Solution Process Under Various pH Conditions Reviewed
Jeong Soo Hong, Hajime Wagata, Naoki Ohashi, Ken-ichi Katsumata, Kiyoshi Okada, Nobuhiro Matsushita
JOURNAL OF ELECTRONIC MATERIALS 44 ( 8 ) 2657 - 2662 2015.8
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NH3-Assisted Flux-Mediated Direct Growth of LaTiO2N Crystallites for Visible-Light-Induced Water Splitting Reviewed
Kenta Kawashirna, Mirabbos Hojamberdiev, Hajirne Wagata, Kunio Yubuta, Junie Jhon M. Vequizo, Akira Yamakata, Shuji Oishi, Kazunari Domen, Katsuya Teshima
JOURNAL OF PHYSICAL CHEMISTRY C 119 ( 28 ) 15896 - 15904 2015.7
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Formation Process of Eosin Y-Adsorbing ZnO Particles by Electroless Deposition and Their Photoelectric Conversion Properties Reviewed
Satoshi Nagaya, Hiromasa Nishikiori, Hideaki Mizusaki, Hajime Wagata, Katsuya Teshima
ACS APPLIED MATERIALS & INTERFACES 7 ( 21 ) 11592 - 11598 2015.6
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Flux-Assisted Fabrication of Vertically Aligned Layered Double Hydroxide Plates on in Situ Formed Alumina Particles Reviewed
Fumitaka Hayashi, Akemi Shirasaki, Hajime Wagata, Hideya Kamikawa, Yoshie Aoki, Shuji Oishi, Katsuya Teshima
CRYSTAL GROWTH & DESIGN 15 ( 2 ) 732 - 736 2015.2
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Chloride Flux Growth of La2Ti2O7 Crystals and Subsequent Nitridation To Form LaTiO2N Crystals Reviewed
Hajime Wagata, Nobuyuki Zettsu, Akiko Yamaguchi, Hiromasa Nishikiori, Kunio Yubuta, Shuji Oishi, Katsuya Teshima
CRYSTAL GROWTH & DESIGN 15 ( 1 ) 124 - 128 2015.1
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Chloride Flux Growth of La2TiO5 Crystals and Nontopotactic Solid-State Transformation to LaTiO2N Crystals by Nitridation Using NH3 Reviewed
Kenta Kawashima, Mirabbos Hojamberdiev, Hajime Wagata, Kunio Yubuta, Shuji Oishi, Katsuya Teshima
CRYSTAL GROWTH & DESIGN 15 ( 1 ) 333 - 339 2015.1
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Epitaxial growth of orthorhombic NaTaO3 crystals on SrTiO3 (100) surface by flux coating Reviewed
Sayaka Suzuki, Hajime Wagata, Kunio Yubuta, Shuji Oishi, Katsuya Teshima
CRYSTENGCOMM 17 ( 47 ) 9016 - 9019 2015
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A novel flux coating method for the fabrication of layers of visible-light-responsive Ta3N5 crystals on tantalum substrates Reviewed
Sayaka Suzuki, Hajime Wagata, Mugi Komatsus, Tsutomu Minegishi, Kazunari Domen, Shuji Oishia, Katsuya Teshima
JOURNAL OF MATERIALS CHEMISTRY A 3 ( 26 ) 13946 - 13952 2015
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新しい結晶層作製&デザイン技術～フラックスコーティング法の提案～
手嶋勝弥, 我田元, 是津信行, 大石修治
コンバーテック 1 ( 1 ) 76 - 81 2015
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Interaction between dye and zinc in the dye-dispersing ZnO films prepared by a wet process
Hiromasa Nishikiori, Takumi Takikawa, Kazuki Ito, Satoshi Nagaya, Hajime Wagata, Katsuya Teshima, Tsuneo Fujii
Research on Chemical Intermediates 41 ( 9 ) 6559-6574 2015
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Formation of ZnO thin films by photocatalytic reaction Reviewed
Hiromasa Nishikiori, Satoshi Nagaya, Takumi Takikawa, Ayaka Kikuchi, Tomohiko Yamakami, Hajime Wagata, Katsuya Teshima, Tsuneo Fujii
APPLIED CATALYSIS B-ENVIRONMENTAL 160 651 - 657 2014.11
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Direct Fabrication of Densely Packed Idiomorphic Li4Ti5O12 Crystal Layers on Substrates by Using a LiCI-NaCI Mixed Flux and Their Additive-Free Electrode Characteristics Reviewed
Nobuyuki Zettsu, Yusuke Mizuno, Hiroki Kojima, Kunio Yubuta, Takuya Sakaguchi, Toshiya Saito, Hajime Wagata, Shuji Oishi, Katsuya Teshima
CRYSTAL GROWTH & DESIGN 14 ( 11 ) 5634 - 5639 2014.11
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Nature-mimetic flux innovation of functional inorganic crystals and layers for green energy & environmental materials Reviewed
Katsuya Teshima, Nobuyuki Zettsu, Hajime Wagata, Shuji Oishi
Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 61 ( 9 ) 454 - 459 2014.9
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Fabrication of LiCoO2 Crystal Layers Using a Flux Method and Their Application for Additive-Free Lithium-Ion Rechargeable Battery Cathodes Reviewed
Yusuke Mizuno, Nobuyuki Zettsu, Kunio Yubuta, Takuya Sakaguchi, Toshiya Saito, Hajime Wagata, Shuji Oishi, Katsuya Teshima
CRYSTAL GROWTH & DESIGN 14 ( 4 ) 1882 - 1887 2014.4
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Low-temperature growth of spinel-type Li1+xMn2-xO4 crystals using a LiCl-KCl flux and their performance as a positive active material in lithium-ion rechargeable batteries Reviewed
Yusuke Mizuno, Nobuyuki Zettsu, Hikaru Inagaki, Shigeki Komine, Kenichiro Kami, Kunio Yubuta, Hajime Wagata, Shuji Oishi, Katsuya Teshima
CRYSTENGCOMM 16 ( 6 ) 1157 - 1162 2014
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SrCl2フラックスからのSrSnO3結晶の育成 Reviewed
是津信行, 清水康介, 我田元, 大石修治, 手嶋勝弥
J. Flux Growth 9 ( 1 ) 14 - 17 2014
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Template-free solvothermal preparation of ZnO hollow microspheres covered with c planes Reviewed
Taiki Ihara, Hajime Wagata, Toshihiro Kogure, Ken-ichi Katsumata, Kiyoshi Okada, Nobuhiro Matsushita
RSC ADVANCES 4 ( 48 ) 25148 - 25154 2014
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Flux Growth of Visible-Light-Sensitive Photocatalytic Crystals
56 ( 1 ) 20 - 26 2014
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プラズマプロセスを援用した高接着性ポリテトラフルオ口工チレン/工ポキシ樹指/SUS304界面形成技術 Reviewed
是津信行, 山村和也, 井筒祐志, 我田元, 大石修治, 手嶋勝弥
表面技術 65 ( 5 ) 29 - 35 2014
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Fabrication of heterostructured α-Fe2O3 / ZnO film for photoelectrode by aqueous solution process Reviewed
J. S. Hong, T. Watanabe, H. Wagata, K. Katsumata, K. Okada, N. Matsushita
Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy 61 ( 51 ) S324 - S326 2014
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次世代環境・エネルギー材料のための機能性無機結晶および薄膜のネイチャーミメティックフラックス創成
手嶋勝弥, 是津信行, 我田元, 大石修治
粉体および粉末冶金 61 ( 9 ) 454 - 459 2014
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Design of Functional Crystal Layers via Nature-mimetic Crystal Growth Technique "Flux method"
49 ( 5 ) 372 - 375 2014
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Effects of Thermal Treatment on Crystallographic and Electrical Properties of Transparent Conductive ZnO Films Deposited by Spin-Spray Method Reviewed
JeongSoo Hong, Hajime Wagata, Ken-ichi Katsumata, Kiyoshi Okada, Nobuhiro Matsushita
JAPANESE JOURNAL OF APPLIED PHYSICS 52 ( 11 ) 110108 2013.11
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Fabrication of combined one-dimensional and three-dimensional structure of potassium tungstate crystal layers by spray deposition with polystyrene colloidal crystal templates Reviewed
Hajime Wagata, Maki Fujisawa, Yusuke Mizuno, Nobuyuki Zettsu, Shuji Oishi, Katsuya Teshima
Crystal Growth and Design 13 ( 8 ) 3294 - 3298 2013.8
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Fabrication of NIR-Vis Upconversion YO1-xF1+2x:Ln (Ln = Yb, Er, Ho, and Tm) Crystal Layers by Flux Coating and Investigation of Growth Manner Reviewed
Hajime Wagata, Toshiko Wakabayashi, Sayaka Suzuki, Mayuu Tanaka, Hiromasa Nishikiori, Shuji Oishi, Katsuya Teshima
CRYSTAL GROWTH & DESIGN 13 ( 3 ) 1187 - 1192 2013.3
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Environmentally friendly flux growth of high-quality, idiomorphic Li 5La3Nb2O12 crystals Reviewed
Yusuke Mizuno, Hajime Wagata, Hitoshi Onodera, Kunio Yubuta, Toetsu Shishido, Shuji Oishi, Katsuya Teshima
Crystal Growth and Design 13 ( 2 ) 479 - 484 2013.2
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Flux growth of Sr2Ta2O7 crystals and subsequent nitridation to form SrTaO2N crystals Reviewed
Yusuke Mizuno, Hajime Wagata, Kunio Yubuta, Nobuyuki Zettsu, Shuji Oishi, Katsuya Teshima
CRYSTENGCOMM 15 ( 40 ) 8133 - 8138 2013
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二段階溶液プロセスを用いたH2Ti12O25 ウィスカーの作製 Reviewed
水野祐介, 是津信行, 小島大輝, 我田元, 大石修治, 手嶋勝弥
J. Flux growth 8 ( 1 ) 8 - 11 2013
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高品質な結晶粒子や結晶層を用いたリチウムイオン二次電池高性能化への可能性
手嶋勝弥, 水野祐介, 我田元, 大石修治
Materials Stage 13 ( 1 ) 22 - 25 2013
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我田元, 手嶋勝弥, 大石修治, 是津信行
ケミカルエンジニアリング 58 ( 6 ) 467-473 - 473 2013
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All-crystal-state lithium-ion batteries: Innovation inspired by novel flux coating method
Katsuya Teshima, Hajime Wagata, Shuji Oishi
9th IMAPS/ACerS International Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies, CICMT 2013 187 - 191 2013
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フラックスコーティング法によるタンタル酸化物および窒化物結晶層のビルドアップ形成 Reviewed
鈴木清香, 手嶋勝弥, 我田元, CLUNE J. J, 高田剛, 嶺岸耕, 守屋映祐, 湯蓋邦夫, 伊藤俊, 宍戸統悦, 堂免一成, 大石修治
J Flux Growth 7 ( 2 ) 68 2012.12
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High-Quality Ultra long Hydroxyapatite Nanowhiskers Grown Directly on Titanium Surfaces by Novel Low-Temperature Flux Coating Method Reviewed
Katsuya Teshima, Hajime Wagata, Keita Sakurai, Hiromi Enomoto, Shoko Mori, Kunio Yubuta, Toetsu Shishido, Shuji Oishi
CRYSTAL GROWTH & DESIGN 12 ( 10 ) 4890 - 4896 2012.10
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NaNO3フラックスからの水処理用Na2Ti3O7結晶の大バッチ育成 Reviewed
鈴木清香, 清原瑞穂, 白﨑明美, 我田元, 高見澤美穂, 上川秀哉, 手嶋勝弥, 大石修治
J. Flux growth 7 ( 1 ) 11 - 15 2012
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フラックスからの酸化物結晶成長 Reviewed
大石修治, 手嶋勝弥, 我田元
64 ( 12 ) 568 - 573 2012
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Direct growth of ultralong, idiomorphic hydroxyapatite nanowhiskers on a titanium substrate by low-temperature flux coating method
Katsuya Teshima, Hajime Wagata, Hiromi Enomoto, Shoko Mori, Kunio Yubuta, Toetsu Shishido, Shuji Oishi
Crystal Growth & Design 12 ( 10 ) 4890-4896 2012
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An aqueous solution process and subsequent UV treatment for highly transparent conductive ZnO films Reviewed
Hajime Wagata, Naoki Ohashi, Ken-ichi Katsumata, Hiroyo Segawa, Yoshiki Wada, Hideki Yoshikawa, Shigenori Ueda, Kiyoshi Okada, Nobuhiro Matsushita
JOURNAL OF MATERIALS CHEMISTRY 22 ( 38 ) 20706 - 20712 2012
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Effect of Illuminated Light Wavelength on Electric Resistance of Zinc Oxide Films Prepared by Spin-Spray Method Reviewed
H. Wagata, K. Katsumata, N. Ohashi, K. Okada, N. Matsushita, S. Oishi, K. Teshima
J. Flux Growth 7 ( 2 ) 55 - 59 2012
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LiClフラックス冷却法によるLi1+xAlxGe2-x(PO4)3結晶の育成 Reviewed
水野祐介, 我田元, 小野寺仁志, 単躍進, 大石修治, 手嶋勝弥
J. Soc. Inorg. Mater. Jpn. 19 299 - 303 2012
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Photocatalytic Activity and Related Surface Properties of Transparent ZnO Films Prepared by a Low-temperature Aqueous Route Reviewed
Hajime Wagata, Ken-ichi Katsumata, Naoki Ohashi, Munetoshi Sakai, Akira Nakajima, Akira Fujishima, Kiyoshi Okada, Nobuhiro Matsushita
PHOTOCHEMISTRY AND PHOTOBIOLOGY 87 ( 5 ) 1009 - 1015 2011.9
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The effect of citric ion on the spin-sprayed ZnO films: IR and XPS study for the organic impurities Reviewed
Hajime Wagata, Naoki Ohashi, Ken-ichi Katsumata, Kiyoshi Okada, Nobuhiro Matsushita
ELECTROCERAMICS IN JAPAN XIV 485 291 - + 2011
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Control of the Microstructure and Crystalline Orientation of ZnO Films on a Seed-free Glass Substrate by Using a Spin-Spray Method Reviewed
Hajime Wagata, Naoki Ohashi, Takaaki Taniguchi, Ken-ichi Katsumata, Kiyoshi Okada, Nobuhiro Matsushita
CRYSTAL GROWTH & DESIGN 10 ( 11 ) 4968 - 4975 2010.11
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Single-Step Fabrication of ZnO Rod Arrays on a Nonseeded Glass Substrate by a Spin-Spray Technique at 90 degrees C Reviewed
Hajime Wagata, Naoki Ohashi, Takaaki Taniguchi, A. K. Subramani, Ken-ichi Katsumata, Kiyoshi Okada, Nobuhiro Matsushita
CRYSTAL GROWTH & DESIGN 10 ( 8 ) 3502 - 3507 2010.8
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Fabrication of BaTiO3 Thin Films and Microdot Patterns by Halide-Free Nonaqueous Solution Route
Hajime Wagata, Takaaki Taniguchi, Ruwan Gallage, A. K. Subramani, Naonori Sakamoto, Tomoaki Watanabe, Masahiro Yoshimura, Nobuhiro Matsushita
JOURNAL OF THE AMERICAN CERAMIC SOCIETY 93 ( 2 ) 381 - 386 2010.2
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Identifying Defects in Ceria-Based Nanocrystals by UV Resonance Raman Spectroscopy
Takaaki Taniguchi, Tomoaki Watanabe, Naota Sugiyama, A. K. Subramani, Hajime Wagata, Nobuhiro Matsushita, Masahiro Yoshimura
The Journal of Physical Chemistry C 113 ( 46 ) 19789 - 19793 2009.11
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Patterning of BaTiO3 by inkjet deposition using a precursor solution Reviewed
Hajime Wagata, Ruwan Gallage, Masahiro Yoshimura, Nobuhiro Matsushita
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS 161 ( 1-3 ) 146 - 150 2009.4
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Preparation and electrochemical property of manganese oxide/carbon composites Reviewed
Y. Kameshima, H. Wagata, A. Nakajima, K. Okada
Journal of Physics: Conference Series 191 012015 2009
MISC
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TEM observation for low-temperature grown spinel-type LiMn2O4 crystals
K. Yubuta, Y. Mizuno, N. Zettsu, S. Komine, K. Kami, H. Wagata, S. Oishi, K. Teshima
ACTA CRYSTALLOGRAPHICA A-FOUNDATION AND ADVANCES 70 C749 - C749 2014.8
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Design of Crystal Phase-Interface Structures by Flux Coating Method
51 ( 4 ) 126 - 129 2014
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P-OS7-2 Flux Coating Fabrication of Li_4Ti_5O_<12> Nanocrystal Layers on Solid Electrolyte for Application to the Storage Device
Takei Motoki, Wagata Hajime, Mizuno Yusuke, Teshima Katsuya, Oishi Shuji
2012 ( 4 ) 297 - 298 2012.10
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OS7-2-1 Facile Fabrication of LiCoO_2 Layers on Cobalt-Coated Aluminum Substrate by Flux Coating Method
WAGATA Hajime, MIZUNO Yusuke, OISHI Shuji, TESHIMA Katsuya
2012 ( 4 ) 17 - 18 2012.10
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OS7-3-2 Growth of One-Dimensional NiO and CeO_2 Crystals by Chloride Flux Method
Sakurai Keita, Wagata Hajime, Yubuta Kunio, Shishido Toetsu, Teshima Katsuya, Oishi Shuji
2012 ( 4 ) 55 - 56 2012.10
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P-OS7-1 Novel Flux Coating Formation of Visible-Light-Driven Photocatalytic Crystal Thin Films for Contributing to Next-Generation Green Innovation
Teshima Katsuya, Suzuki Sayaka, Wagata Hajime, Domen Kazunari, Oishi Shuji
2012 ( 4 ) 295 - 296 2012.10
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Recycling of waste solution of ferrite plating to attain low environmental load
TAKEUCHI Asako, WAGATA Hajime, KATSUMATA Ken-ichi, OKADA Kiyoshi, MATSUSHITA Nobuhiro
2010 ( 199 ) 17 - 21 2010.12
Research Projects
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Fabrication of ZnO transparent electrodes with controlled crystal planes by an aqueous solution method and their application to spectroelectrochemical sensors
Grant number：24K08042 2024.4 - 2027.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
Grant amount：\4550000 （ Direct Cost: \3500000 、 Indirect Cost：\1050000 ）
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水溶液法による酸化ガリウムエピタキシャル層の低温直接形成
Grant number：21K04657 2021.4 - 2024.3
日本学術振興会 科学研究費助成事業 基盤研究(C)
我田 元
Grant amount：\4160000 （ Direct Cost: \3200000 、 Indirect Cost：\960000 ）
本研究では、次世代パワーデバイス用材料のひとつとして期待されるβ-酸化ガリウムエピタキシャル層を水溶液法により形成することを目的とする。通常、β-酸化ガリウム層は500℃～1000℃の高温かつ高真空を利用する気相法で作製される。それに対し、低温・低温エネルギー、かつ大気圧を利用する水溶液法でのβ-酸化ガリウム層形成が可能となれば、環境負荷の低減だけでなく、製造コスト低減によりβ-酸化ガリウムの普及への一助となると考えられる。本研究では、水溶性ガリウム塩であるヘキサフルオロガリウム酸アンモニウムを合成し、その水溶液中での加水分解反応を制御することで、従来は困難であった水溶液中でのβ-酸化ガリウム層形成を目指す。また、Non-Seed CBD (Chemical Bath Deposition, 化学浴堆積)法を利用することで、β-酸化ガリウムエピタキシャル層の低温直接形成を目指す。
本年度は、ボールミル装置の導入とヘキサフルオロガリウム酸アンモニウムの合成に注力した。硝酸ガリウムn水和物とフッ化アンモニウムのメカノケミカル反応によるヘキサフルオロガリウム酸アンモニウム合成を試みた。原料由来の水和水が存在するため、ヘキサフルオロガリウム酸アンモニウムと副生物の硝酸アンモニウムが両方とも溶解した状態の溶液が得られるが、貧溶媒析出法を利用することで、ヘキサフルオロガリウム酸アンモニウムを分離できることを見出した。得られたヘキサフルオロガリウム酸アンモニウムは不純物相をわずかに含むが、全て水に溶解したことから、ガリウム含有量を定量すればβ-酸化ガリウム成膜実験に使用可能と考えられる。 -
3D Conductive Area of Solution-Processed ZnO Layer and Transparent Flexible LED
Grant number：15H04122 2015.4 - 2018.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
Matsushita Nobuhiro, Hong Jeongsoo
Grant amount：\16250000 （ Direct Cost: \12500000 、 Indirect Cost：\3750000 ）
Solution-processed ZnO films could exhibit transparent conductivity after UV irradiation. The irradiation of UV-A and UV(λ = 380 nm) only for 1 hour attained the conductivity. The transparent circuit was drawn by UV laser irradiation and the conductive are had 3 order lower resistivity than without irradiation area. The rectification property was obtained the ZnO films deposited on p-Si and p-GaN substrate. The Mn doped ZnO film exhibited the saturation magnetization of 1.68x10-2 emu/g.
It is valuable result that the transparent conductive magnetic ZnO film could be fabricated by solution process. -
The pursuit of next-generation flux
Grant number：26630331 2014.4 - 2016.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research
TESHIMA Katsuya, ZETTSU Nobuyuki, WAGATA Hajime
Grant amount：\3900000 （ Direct Cost: \3000000 、 Indirect Cost：\900000 ）
We propose a novel method, termed “glass-flux growth,” for fabrication of composite materials formed by crystals and glass matrices with different chem-ical phases, with well-connected and pure interfaces. In traditional flux method, the remaining fluxes are removed from the final products to isolate the target crys-tals. We expect that if the flux itself can form functional glass phases, the flux method can fabricate a variety of crystal-glass composites. Herein, we fabricated a compo-site of lithium transition metal oxide crystals and glass ma-trix by the glass-flux growth process. Their interfaces were well-connected and very smooth, without impurity phases. The glass-flux method is very simple, inexpensive, envi-ronmentally-friendly, like the traditional flux method. In future, the use of such “glass-flux growth” processes will become increasingly important in the fabrication of vari-ous functional material composites.
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A proposal of a novel solution process for realization of precise design of oxide film structures
Grant number：26820293 2014.4 - 2016.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Young Scientists (B)
WAGATA Hajime
Grant amount：\4030000 （ Direct Cost: \3100000 、 Indirect Cost：\930000 ）
Solution process is a promising technique for realizing low-temperature, low-cost, environmentally-friendly fabrication of materials compared to conventional solid-state-reaction method and vapor-phase method. In this study, reactive spin coating method, a new solution process, was developed and fabrication of ZnO films for the application to transparent conductive oxides were examined. As a results, we achieved fabrication of ZnO crystal on glass substrate by reactive spin coating method. Moreover, a new additive which can control the film structure precisely were found.
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Materials innovation via flux coating method
Grant number：25249089 2013.4 - 2018.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)
TESHIMA Katsuya
Grant amount：\45630000 （ Direct Cost: \35100000 、 Indirect Cost：\10530000 ）
In the present research, based on the research stage of "On the creation of highly crystalline materials aiming for an energy and environmental device applications," we attempted to provide some examples of the concept of flux coating method. In the flux coating method, a principal investigator pioneers the leading edge, and introduced materials design for inorganic materials synthesis based on the knowledge of researchers and engineers. Flux crystal growth and coating method are the optimum technologies that connect computational science and experimental system, and highly efficient and highly crystalline materials (perticles and layers) were fabricated by integrating with in-situ observation / analysis technologies. In addition, we proposed some kinds of energy and environmental devises utilizing the flux-grown crystals.
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Preparation of Oxide Mesocrystal Films and Their Application to Transparent Conducting Films
Grant number：24860031 2012.8 - 2014.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Research Activity Start-up
WAGATA Hajime
Grant amount：\2990000 （ Direct Cost: \2300000 、 Indirect Cost：\690000 ）
In this research, we aim low-temperature fabrication of metal oxide crystal films for substitution of tin-doped indium oxide by a new film processing technique which can achieve low environmental load, high deposition rate, and cost effectiveness. ZnO films with visible-light transparency over 70 percents and electrical resistivity about 5X10-3 ohm cm were successfully fabricated by spin-spray method with controlling the flow rate of solution and rotation rate of table. When water-soluble polymer was used as an additive, the crystal shape was changed by different manner with trisodium citrate. The performance of ZnO films prepared by using water-soluble polymer was not improved compared with those prepared with trisodium citrate. The results indicated that the adsorbed organics and film structure strongly affected electrical properties.
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Fabrication of transparent ZnO films by solution process and challenge for fabricating transparent circuit
Grant number：24360270 2012.4 - 2016.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
Matsushita Nobuhiro, Wagata Hajime, Katsumata Kenichi
Grant amount：\17420000 （ Direct Cost: \13400000 、 Indirect Cost：\4020000 ）
The source solution containing Zn ion and the reaction solution containing NH3 and trisodiumcitrate were sprayed on heated substrate to deposit transparet ZnO film. The deposited film treated by hydrogen treatment prior to UV irradiation exhibited the lowest resistivity of 1.8×10-3 Ω・cm. The transparent conductive ZnO films were successfully fabricated even on plastic substrate(PES), The transparent circuit could be drawn in solution-processed ZnO films by irradiating UV only in restricted area. The utilization of ammine complex enbled to develop a novel solution process in which only one solution was used for depositing transparent conductive ZnO films.
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