Naoto Umezawa
Naoto Umezawa
Samsung Electronics
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Nano‐photocatalytic materials: possibilities and challenges
H Tong, S Ouyang, Y Bi, N Umezawa, M Oshikiri, J Ye
Advanced materials 24 (2), 229-251, 2012
Facet Effect of Single-Crystalline Ag3PO4 Sub-microcrystals on Photocatalytic Properties
Y Bi, S Ouyang, N Umezawa, J Cao, J Ye
Journal of the American Chemical Society 133 (17), 6490-6492, 2011
Hybrid functional studies of the oxygen vacancy in
A Janotti, JB Varley, P Rinke, N Umezawa, G Kresse, CG Van de Walle
Physical Review B 81 (8), 085212, 2010
Recent advances in TiO 2-based photocatalysis
H Xu, S Ouyang, L Liu, P Reunchan, N Umezawa, J Ye
Journal of Materials Chemistry A 2 (32), 12642-12661, 2014
Surface-Alkalinization-Induced Enhancement of Photocatalytic H2 Evolution over SrTiO3-Based Photocatalysts
S Ouyang, H Tong, N Umezawa, J Cao, P Li, Y Bi, Y Zhang, J Ye
Journal of the American Chemical Society 134 (4), 1974-1977, 2012
Anatase TiO2 Single Crystals Exposed with High-Reactive {111} Facets Toward Efficient H2 Evolution
H Xu, P Reunchan, S Ouyang, H Tong, N Umezawa, T Kako, J Ye
Chemistry of Materials 25 (3), 405-411, 2013
Covalency-reinforced oxygen evolution reaction catalyst
S Yagi, I Yamada, H Tsukasaki, A Seno, M Murakami, H Fujii, H Chen, ...
Nature communications 6, 8249, 2015
Facet engineered Ag 3 PO 4 for efficient water photooxidation
DJ Martin, N Umezawa, X Chen, J Ye, J Tang
Energy & Environmental Science 6 (11), 3380-3386, 2013
Theoretical study of high photocatalytic performance of Ag 3 PO 4
N Umezawa, O Shuxin, J Ye
Physical Review B 83 (3), 035202, 2011
Self-doped SrTiO 3− δ photocatalyst with enhanced activity for artificial photosynthesis under visible light
K Xie, N Umezawa, N Zhang, P Reunchan, Y Zhang, J Ye
Energy & Environmental Science 4 (10), 4211-4219, 2011
First-principles studies of the intrinsic effect of nitrogen atoms on reduction in gate leakage current through Hf-based high- dielectrics
N Umezawa, K Shiraishi, T Ohno, H Watanabe, T Chikyow, K Torii, ...
Applied Physics Letters 86 (14), 143507, 2005
Modified oxygen vacancy induced fermi level pinning model extendable to P-metal pinning
Y Akasaka, G Nakamura, K Shiraishi, N Umezawa, K Yamabe, O Ogawa, ...
Japanese journal of applied physics 45 (12L), L1289, 2006
Photocatalytic Water Splitting under Visible Light by Mixed-Valence Sn3O4
M Manikandan, T Tanabe, P Li, S Ueda, GV Ramesh, R Kodiyath, J Wang, ...
ACS applied materials & interfaces 6 (6), 3790-3793, 2014
Theoretical design of highly active SrTiO 3-based photocatalysts by a codoping scheme towards solar energy utilization for hydrogen production
P Reunchan, S Ouyang, N Umezawa, H Xu, Y Zhang, J Ye
Journal of Materials Chemistry A 1 (13), 4221-4227, 2013
Microwave-assisted deposition of metal sulfide/oxide nanocrystals onto a 3D hierarchical flower-like TiO 2 nanostructure with improved photocatalytic activity
L Mao, Y Wang, Y Zhong, J Ning, Y Hu
Journal of Materials Chemistry A 1 (28), 8101-8104, 2013
Examining the performance of refractory conductive ceramics as plasmonic materials: a theoretical approach
M Kumar, N Umezawa, S Ishii, T Nagao
ACS Photonics 3 (1), 43-50, 2016
Gold photosensitized SrTiO 3 for visible-light water oxidation induced by Au interband transitions
L Liu, P Li, B Adisak, S Ouyang, N Umezawa, J Ye, R Kodiyath, T Tanabe, ...
Journal of Materials Chemistry A 2 (25), 9875-9882, 2014
Suppression of oxygen vacancy formation in Hf-based high- dielectrics by lanthanum incorporation
N Umezawa, K Shiraishi, S Sugino, A Tachibana, K Ohmori, K Kakushima, ...
Applied Physics Letters 91 (13), 132904, 2007
BaSi2 as a promising low-cost, earth-abundant material with large optical activity for thin-film solar cells: A hybrid density functional study
M Kumar, N Umezawa, M Imai
Applied Physics Express 7 (7), 071203, 2014
Constructing cubic–orthorhombic surface-phase junctions of NaNbO 3 towards significant enhancement of CO 2 photoreduction
P Li, H Xu, L Liu, T Kako, N Umezawa, H Abe, J Ye
Journal of Materials Chemistry A 2 (16), 5606-5609, 2014
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