UMEZAWA Naoto 梅澤直人

Researcher Number	20455273
Affiliation (based on the past Project Information) *help	2016 – 2018: 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス拠点, 主幹研究員 2015 – 2017: 国立研究開発法人物質・材料研究機構, 光触媒材料センター, 主任研究員 2016: 国立研究開発法人物質・材料研究機構, 国際ナノアーキテクトニクス研究拠点, 主任研究員 2015: 国立研究開発法人物質・材料研究機構, 環境再生材料ユニット・触媒機能材料グループ, 主任研究員 2014: 独立行政法人物質・材料研究機構, 環境再生材料ユニット触媒機能材料グループ, 主任研究員 2009 – 2010: National Institute for Materials Science, 光触媒材料センター, 主任研究員
Review Section/Research Field	Principal Investigator Thin film/Surface and interfacial physical properties / Mathematical physics/Fundamental condensed matter physics / Thin film/Surface and interfacial physical properties Except Principal Investigator Physical properties of metals/Metal-base materials / Metal making/Resorce production engineering
Keywords	Principal Investigator 光触媒 / 第一原理計算 / 水素生成 / 太陽光利用 / 可視光応答化 / 界面 / 結晶構造予測 / シート状材料 / 太陽電池 / 酸化スズ … More / 結晶構造探索 / 計算物理 / バンドギャップ / 密度汎関数法 / 電子密度 / 機械学習 / 相関汎関数 / 多価元素 / high-k / 欠陥密度 / 電子相関 / 界面制御 / 不純物ドープ / ゲート絶縁膜 / 酸化物 / 格子欠陥 / 不純物 … More Except Principal Investigator シリサイド / 環境材料 / 太陽電池 / 半導体物性 / バンドギャップ / 置換効果 / 太陽電池材料 / バリウムシリサイド / 構造解析 / 高圧合成 / 触媒・化学プロセス / 四重ペロブスカイト / 水電解 / 異常高原子価 / 電極反応 / 活性化エネルギー / 交換電流密度 / ターフェルプロット / 過電圧 / 電極 / 二機能性触媒 / 結晶構造 / 異常原子価イオン / 酸素還元反応 / 酸素発生反応 / 電気化学触媒 Less

第一原理機械学習計算手法の開発Principal Investigator
- Principal Investigator
  
  梅澤直人
- Project Period (FY)
  2016
- Research Category
  
  Grant-in-Aid for Challenging Exploratory Research
- Research Field
  
  Mathematical physics/Fundamental condensed matter physics
- Research Institution
  National Institute for Materials Science
Development of thin-film multi-junction solar-cell materials that consist of earth-abundant elements
- Principal Investigator
  
  Imai Motoharu
- Project Period (FY)
  2016 – 2018
- Research Category
  
  Grant-in-Aid for Scientific Research (C)
- Research Field
  
  Physical properties of metals/Metal-base materials
- Research Institution
  National Institute for Materials Science
Activation and its mechanism of oxygen evolution reaction catalysts by unusual valence iron ions
- Principal Investigator
  
  Yagi Shunsuke
- Project Period (FY)
  2015 – 2017
- Research Category
  
  Grant-in-Aid for Scientific Research (B)
- Research Field
  
  Metal making/Resorce production engineering
- Research Institution
  The University of Tokyo
  Osaka Prefecture University
グラフェン状シート材料／ＴｉＯ２界面の光触媒活性の理論的研究Principal Investigator
- Principal Investigator
  
  梅澤直人
- Project Period (FY)
  2014 – 2015
- Research Category
  
  Grant-in-Aid for JSPS Fellows
- Research Field
  
  Thin film/Surface and interfacial physical properties
- Research Institution
  National Institute for Materials Science
Property control of oxides from impurity doping toward materials designPrincipal Investigator
- Principal Investigator
  
  UMEZAWA Naoto
- Project Period (FY)
  2009 – 2010
- Research Category
  
  Grant-in-Aid for Young Scientists (B)
- Research Field
  
  Thin film/Surface and interfacial physical properties
- Research Institution
  National Institute for Materials Science

All 2018 2017 2016 2015 2014 2011 2010 2009

All Journal Article Presentation Patent

[Journal Article] Crystal structure and electronic properties of Sr-substituted barium disilicide Ba1-xSrxSi2 for solar cells: Computational and experimental studies2018
- Author(s)
  M. Imai, M. Kumar, N. Umezawa
- Journal Title
  
  ACTA MATERIALIA
  
  Volume: 148 Pages: 492-498
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16K06713
[Journal Article] Barium disilicide as a promising thin-film photovoltaic absorber: structural, electronic, and defect properties2017
- Author(s)
  M. Kumar, N. Umezawa, W. Zhou, M. Imai
- Journal Title
  
  JOURNAL OF MATERIALS CHEMISTRY A
  
  Volume: 5 Issue: 48 Pages: 25293-25302
- DOI
  10.1039/c7ta08312b
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-16K06713
[Journal Article] Mixed Valence Tin Oxides as Novel van der Waals Materials: Theoretical Predictions and Potential Applications2016
- Author(s)
  Junjie Wang, Naoto Umezawa, and Hideo Hosono
- Journal Title
  
  Advanced Energy Materials
  
  Volume: 6 Issue: 1
- DOI
  10.1002/aenm.201501190
- Peer Reviewed / Acknowledgement Compliant / Open Access
- Data Source
  KAKENHI-PROJECT-14F04207
[Journal Article] Mesoporous Paladium-Copper Bimetallic Electrodes for Selective Electrocatalytic Reduction of Aqueous CO2 to CO2016
- Author(s)
  Mu Li, Junjie Wang, Peng Li, Kun Chang, Cuiling Li, Tao Wang, Bo Jiang, Huabin Zhang, Huimin Liu, Yusuke Yamauchi, Naoto Umezawa and Jinhua Ye
- Journal Title
  
  J. Mater. Chem. A
  
  Volume: 4 Issue: 13 Pages: 4776-4782
- DOI
  10.1039/c6ta00487c
- Peer Reviewed / Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-14F04207
[Journal Article] Covalency-reinforced oxygen evolution reaction catalyst2015
- Author(s)
  S. Yagi, I. Yamada, H. Tsukasaki, A. Seno,M. Murakami, H. Fujii, H. Chen,N. Umezawa, H. Abe, N. Nishiyama, S. Mori
- Journal Title
  
  Nature Communications
  
  Volume: 6 Issue: 1 Pages: 8249-8249
- DOI
  10.1038/ncomms9249
- Peer Reviewed / Acknowledgement Compliant / Open Access
- Data Source
  KAKENHI-PROJECT-15H04169
[Journal Article] Photocatalytic Water Splitting under Visible Light by Mixed-Valence Sn3O42014
- Author(s)
  Maidhily Manikandan, Toyokazu Tanabe, Peng Li, Shigenori Ueda, Gubbala V. Ramesh, Rajesh Kodiyath, Junjie Wang, Toru Hara, Arivuoli Dakshanamoorthy, Shinsuke Ishihara, Katsuhiko Ariga, Jinhua Ye, Naoto Umezawa,* and Hideki Abe*
- Journal Title
  
  ACS APPLIED MATERIALS & INTERFACES
  
  Volume: 6 Issue: 6 Pages: 3790-3793
- DOI
  10.1021/am500157u
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-14F04207
[Journal Article] Electronic coupling assembly of semiconductor nanocrystals : self-narrowed band gap to promise solar energy utilization2011
- Author(s)
  Hua Tong, Naoto Umezawa, Jinhua Ye, Takahisa Ohno
- Journal Title
  
  Energy, Environmental Science 4
  
  Pages: 1684-1689
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21760030
[Journal Article] Visible light photoactivity from a bonding assembly of titanium oxide nonocrystals2011
- Author(s)
  Hua Tong, Naoto Umezawa, Jinhua Ye
- Journal Title
  
  Chem.Comm. 47
  
  Pages: 4219-4221
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21760030
[Journal Article] Theoretical study of high photocatalytic performance of Ag3PO42011
- Author(s)
  Naoto Umezawa, Ouyang Shuxin, Jinhua Ye
- Journal Title
  
  Phys.Rev.B 83
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21760030
[Journal Article] Facet Effect of Single-Crystalline Ag3PO4 Sub-microcrystals on Photocatalytic Properties2011
- Author(s)
  Yingpu Bi, Shuxin Ouyang, Naoto Umezawa, Junyu Cao, Jinhua Ye
- Journal Title
  
  Journal of the American Chemical Society
  
  Volume: 133 Pages: 6490-6492
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21760030
[Journal Article] Visible light photoactivity from a bonding assembly of titanium oxide nonocrystals2011
- Author(s)
  Hua Tong, Naoto Umezawa, Jinhua Ye
- Journal Title
  
  Chemical Communications
  
  Volume: 47 Pages: 4219-4221
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21760030
[Journal Article] Theoretical study of high photocatalytic performance of Ag3PO42011
- Author(s)
  Naoto Umezawa, Ouyang Shuxin, Jinhua Ye
- Journal Title
  
  Physical Review B
  
  Volume: 83
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21760030
[Journal Article] Electronic coupling assembly of semiconductor nanocrystals : self-narrowed band gap to promise solar energy utilization2011
- Author(s)
  Hua Tong, Naoto Umezawa, Jinhua Ye, Takahisa Ohno
- Journal Title
  
  Energy & Environmental Science
  
  Volume: 4 Pages: 1684-1689
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21760030
[Journal Article] Facet Effect of Single-Crystalline Ag3PO4 Sub-microcrystals on Photocatalytic Properties2011
- Author(s)
  Yingpu Bi, Shuxin Ouyang, Naoto Umezawa, Junyu Cao, Jinhua Ye
- Journal Title
  
  J.Am.Chem.Soc. 133
  
  Pages: 6490-6492
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21760030
[Journal Article] Origin of high solubility of silicon in La2O3 : A first-principles study2010
- Author(s)
  Naoto Umezawa, Kenji Shiraishi
- Journal Title
  
  Applied Physics Letters
  
  Volume: 97
- NAID
  120007137820
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21760030
[Journal Article] Origin of high solubility of silicon in La_2O_3 : A first-principles study2010
- Author(s)
  Naoto Umezawa, Kenji Shiraishi
- Journal Title
  
  Appl.Phys.Lett. 97
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21760030
[Journal Article] Effects of capping HfO_2 with multivalent oxides toward reducing the number of charged defects2010
- Author(s)
  Naoto Umezawa
- Journal Title
  
  Applied Physics Letters 96
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21760030
[Journal Article] Effects of capping HfO2 with multivalent oxides toward reducing the number of charge defects2010
- Author(s)
  Naoto Umezawa
- Journal Title
  
  Appl.Phys.Lett. 96
- Peer Reviewed
- Data Source
  KAKENHI-PROJECT-21760030
[Patent] 光触媒及びその製造方法2015
- Inventor(s)
  阿部英樹、梅澤直人
- Industrial Property Rights Holder
  阿部英樹、梅澤直人
- Industrial Property Rights Type
  特許
- Industrial Property Number
  2014-010313
- Filing Date
  2015-01-20
- Data Source
  KAKENHI-PROJECT-14F04207
[Patent] 界面層削減方法、高誘電率ゲート絶縁膜の形成方法、高誘電率絶縁膜、及び高誘電率ゲート酸化膜を有するトランジスタ2009
- Inventor(s)
  梅澤直人, 知京豊裕, 生田目俊秀
- Industrial Property Rights Holder
  物質・材料研究機構
- Industrial Property Number
  2009-273000
- Filing Date
  2009-12-01
- Data Source
  KAKENHI-PROJECT-21760030
[Patent] 界面層削減方法、高誘電率ゲート絶縁膜の形成方法、高誘電率絶縁膜、及び高誘電率ゲート酸化膜を有するトランジスタ2009
- Inventor(s)
  梅澤直人、知京豊裕、生田目俊秀
- Industrial Property Rights Holder
  独立行政法人物質・材料研究機構
- Filing Date
  2009-12-01
- Data Source
  KAKENHI-PROJECT-21760030
[Presentation] Ba1-xSrxSi2の電子構造III2018
- Author(s)
  今井基晴, クマールムケシュ, 梅澤直人.
- Organizer
  第79回応用物理学会秋季学術講演会
- Data Source
  KAKENHI-PROJECT-16K06713
[Presentation] BaSi2の電子構造2017
- Author(s)
  今井基晴, KUMARMukesh, 梅澤直人
- Organizer
  第64回応用物理学会春季学術講演会
- Place of Presentation
  パシフィコ横浜（横浜）
- Year and Date
  2017-03-14
- Data Source
  KAKENHI-PROJECT-16K06713
[Presentation] Zintl相太陽電池材料BaSi2の電子状態と光学的性質2016
- Author(s)
  今井基晴, KUMARMukesh, 梅澤直人
- Organizer
  第一回固体化学フォーラム研究会
- Place of Presentation
  東京大学（柏）
- Year and Date
  2016-06-14
- Data Source
  KAKENHI-PROJECT-16K06713
[Presentation] Electronic and optical properties of BaSi22016
- Author(s)
  M. Imai, M. Kumar, N. Umezawa
- Organizer
  APAC SILICIDE2016
- Place of Presentation
  九州大学（福岡）
- Year and Date
  2016-07-16
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-16K06713
[Presentation] Transcorrelated 法に基づく相関エネルギー汎関数の開発2016
- Author(s)
  梅澤直人
- Organizer
  日本物理学会
- Place of Presentation
  金沢大学（石川県・金沢市角間町）
- Year and Date
  2016-09-13
- Data Source
  KAKENHI-PROJECT-16K13852
[Presentation] Theoretical prediction of stable tin oxides: stoichiometry, electronic structure and possible applications2015
- Author(s)
  Junjie Wang and Naoto Umezawa
- Organizer
  American Physical Society March meeting
- Place of Presentation
  San Antonio
- Year and Date
  2015-03-02
- Data Source
  KAKENHI-PROJECT-14F04207
[Presentation] 新規酸素発生反応触媒の構造・活性2015
- Author(s)
  山田幾也, 八木俊介, 塚崎裕文, 瀬野晃大, 藤井央, 梅澤直人, 阿部英樹, 森茂生
- Organizer
  平成27年度資源・素材関係学協会合同秋季大会
- Place of Presentation
  愛媛大学（愛媛）
- Year and Date
  2015-09-09
- Data Source
  KAKENHI-PROJECT-15H04169
[Presentation] Computational crystal structure prediction of mixed valence tin oxide photocatalysts2015
- Author(s)
  梅澤直人
- Organizer
  Pacifichem 2015
- Place of Presentation
  Honolulu
- Year and Date
  2015-12-19
- Int'l Joint Research
- Data Source
  KAKENHI-PROJECT-14F04207
[Presentation] 共有結合性の向上による酸素発生触媒の活性化2015
- Author(s)
  八木俊介, 山田幾也,塚崎裕文, 瀬野晃大, 藤井央, 梅澤直人, 阿部英樹, 森茂生
- Organizer
  平成27年度資源・素材関係学協会合同秋季大会
- Place of Presentation
  愛媛大学（愛媛）
- Year and Date
  2015-09-09
- Data Source
  KAKENHI-PROJECT-15H04169
[Presentation] First principles prediction of stable tin oxides: stoichiometry, electronic structure and possible applications2014
- Author(s)
  Junjie Wang, Hideki Abe, and Naoto Umezawa
- Organizer
  The 15th IUMRS-International Conference in Asia
- Place of Presentation
  Fukuoka
- Year and Date
  2014-08-25
- Data Source
  KAKENHI-PROJECT-14F04207
[Presentation] Building correlation energy functional from transcorrelated approach2010
- Author(s)
  Naoto Umezawa, Brian Austin, William A.Lester, Jr.
- Organizer
  Psi-k meeting 2010
- Place of Presentation
  Berlin
- Year and Date
  2010-09-15
- Data Source
  KAKENHI-PROJECT-21760030
[Presentation] Remote Control of High-k/Si Gate Stack Properties2010
- Author(s)
  Naoto Umezawa
- Organizer
  2010 Materials Research Society Spring Meeting
- Place of Presentation
  San Francisco, California, USA
- Year and Date
  2010-04-07
- Data Source
  KAKENHI-PROJECT-21760030
[Presentation] Self-interaction-free nonlocal correlation energy functional associated with a Jastrow function2010
- Author(s)
  Naoto Umezawa, Brian Austin, William A.Lester, Jr.
- Organizer
  American Physical Society, March Meeting 2010
- Place of Presentation
  Portland, Oregon, USA
- Year and Date
  2010-03-17
- Data Source
  KAKENHI-PROJECT-21760030
[Presentation] Self-interaction-free nonlocal correlation energy functional associated with a Jastrow function2010
- Author(s)
  Naoto Umezawa, Brian Austin, William A.Lester, Jr.
- Organizer
  American Physical Society, March Meeting 2010
- Place of Presentation
  Portland, Oregon, USA.
- Year and Date
  2010-03-17
- Data Source
  KAKENHI-PROJECT-21760030
[Presentation] Building correlation energy functional from transcorrelated approach2010
- Author(s)
  Naoto Umezawa, Brian Austin, William A.Lester, Jr.
- Organizer
  Psi-k meeting 2010
- Place of Presentation
  Berlin.
- Year and Date
  2010-09-15
- Data Source
  KAKENHI-PROJECT-21760030
[Presentation] Quality Control of High-k gate Oxides by Doping with Impurities : Guidelines from Theoretical Analysis2009
- Author(s)
  Naoto Umezawa
- Organizer
  40th IEEE Semiconductor Interface Specialists Conference
- Place of Presentation
  Arlington, Virginia, USA
- Year and Date
  2009-12-03
- Data Source
  KAKENHI-PROJECT-21760030
[Presentation] Quality Control of High-k gate Oxides by Doping with Impurities : Guidelines from Theoretical Analysis2009
- Author(s)
  Naoto Umezawa
- Organizer
  40^<th> IEEE Semiconductor Interface Specialists Conference
- Place of Presentation
  Arlington, Virginia, USA
- Year and Date
  2009-12-03
- Data Source
  KAKENHI-PROJECT-21760030

1. WANG JUNJIE

# of Collaborated Projects: 2 results

# of Collaborated Products: 10 results
2. Yagi Shunsuke (60452273)

# of Collaborated Projects: 1 results

# of Collaborated Products: 3 results
3. YAMADA Ikuya (30378880)

# of Collaborated Projects: 1 results

# of Collaborated Products: 3 results
4. IKENO Hidekazu (30584833)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
5. HIRAI Shigeto (80756669)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
6. Imai Motoharu (90354159)

# of Collaborated Projects: 1 results

# of Collaborated Products: 6 results
7. 瀧川一学 (10374597)

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results
8. Matsushita Yoshitaka

# of Collaborated Projects: 1 results

# of Collaborated Products: 0 results

UMEZAWA Naoto 梅澤 直人

Research Projects

Research Products

Co-Researchers

第一原理機械学習計算手法の開発Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Development of thin-film multi-junction solar-cell materials that consist of earth-abundant elements

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Activation and its mechanism of oxygen evolution reaction catalysts by unusual valence iron ions

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

グラフェン状シート材料／ＴｉＯ２界面の光触媒活性の理論的研究Principal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

Property control of oxides from impurity doping toward materials designPrincipal Investigator

Principal Investigator

Project Period (FY)

Research Category

Research Field

Research Institution

[Journal Article] Crystal structure and electronic properties of Sr-substituted barium disilicide Ba1-xSrxSi2 for solar cells: Computational and experimental studies2018

Author(s)

Journal Title

Data Source

[Journal Article] Barium disilicide as a promising thin-film photovoltaic absorber: structural, electronic, and defect properties2017

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Mixed Valence Tin Oxides as Novel van der Waals Materials: Theoretical Predictions and Potential Applications2016

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Mesoporous Paladium-Copper Bimetallic Electrodes for Selective Electrocatalytic Reduction of Aqueous CO2 to CO2016

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Covalency-reinforced oxygen evolution reaction catalyst2015

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Photocatalytic Water Splitting under Visible Light by Mixed-Valence Sn3O42014

Author(s)

Journal Title

DOI

Data Source

[Journal Article] Electronic coupling assembly of semiconductor nanocrystals : self-narrowed band gap to promise solar energy utilization2011

Author(s)

Journal Title

Data Source

[Journal Article] Visible light photoactivity from a bonding assembly of titanium oxide nonocrystals2011

Author(s)

Journal Title

Data Source

[Journal Article] Theoretical study of high photocatalytic performance of Ag3PO42011

Author(s)

Journal Title

Data Source

[Journal Article] Facet Effect of Single-Crystalline Ag3PO4 Sub-microcrystals on Photocatalytic Properties2011

Author(s)

Journal Title

Data Source

[Journal Article] Visible light photoactivity from a bonding assembly of titanium oxide nonocrystals2011

UMEZAWA Naoto 梅澤直人