Search Results - "Ohwaki, Takeshi"

Nitrogen-Doped Titanium Dioxide as Visible-Light-Sensitive Photocatalyst: Designs, Developments, and Prospects by Asahi, Ryoji, Morikawa, Takeshi, Irie, Hiroshi, Ohwaki, Takeshi

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Improvement of photocatalytic activity under visible-light irradiation by heterojunction of Cu ion loaded WO3 and Cu ion loaded N-TiO2 by Iihoshi, Tomoya, Ohwaki, Takeshi, Vequizo, Junie Jhon M., Yamakata, Akira

“…Photocatalytic activity under visible light irradiation was enhanced by the composites of Cu/WO3 and Cu/N-TiO2. [Display omitted] •Composites of Cu/WO3 and…”
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Charge-Carrier Dynamics in Cu- or Fe-Loaded Nitrogen-Doped TiO2 Powder Studied by Femtosecond Diffuse Reflectance Spectroscopy by Yamanaka, Ken-ichi, Ohwaki, Takeshi, Morikawa, Takeshi

“…The charge-carrier dynamics in Cu- or Fe-loaded nitrogen-doped TiO2 (N-TiO2) powder has been studied at room temperature. Femtosecond diffuse reflectance…”
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Band-Gap Narrowing of Titanium Dioxide by Nitrogen Doping by Morikawa, Takeshi, Asahi, Ryoji, Ohwaki, Takeshi, Aoki, Koyu, Taga, Yasunori

“…TiO 2 -based powder, including 0.1 at% of N doped in the rutile lattice, has been synthesized by oxidation of TiN. As a result, a significant shift of the…”
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Deep-level optical spectroscopy investigation of N-doped TiO2 films by Nakano, Yoshitaka, Morikawa, Takeshi, Ohwaki, Takeshi, Taga, Yasunori

“…N-doped TiO2 films were deposited on n+-GaN∕Al2O3 substrates by reactive magnetron sputtering and subsequently crystallized by annealing at 550 °C in flowing…”
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Electrical characterization of p-type N-doped ZnO films prepared by thermal oxidation of sputtered Zn3N2 films by Nakano, Yoshitaka, Morikawa, Takeshi, Ohwaki, Takeshi, Taga, Yasunori

“…We report on p-type conduction in N-doped ZnO (ZnO:N) films that were prepared by oxidative annealing of sputtered Zn3N2 films at temperatures between 500 and…”
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Evaluation of photocatalytic activities and characteristics of Cu- or Fe-modified nitrogen-doped titanium dioxides for applications in environmental purification by Ohwaki, Takeshi, Saeki, Shu, Aoki, Koyu, Morikawa, Takeshi

“…Photocatalytic activities, as manifested in gas decomposition rates of volatile organic compounds under visible light irradiation, are well known to be…”
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Electrical characterization of band gap states in C-doped TiO2 films by Nakano, Yoshitaka, Morikawa, Takeshi, Ohwaki, Takeshi, Taga, Yasunori

“…We report on band gap states in C-doped TiO2 films that were prepared by oxidative annealing of sputtered TiC films at 550°C in flowing O2 gas. Deep-level…”
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Deep-level characterization of N-doped ZnO films prepared by reactive magnetron sputtering by Nakano, Yoshitaka, Morikawa, Takeshi, Ohwaki, Takeshi, Taga, Yasunori

“…We report on band gap states in N-doped ZnO (ZnO:N) films that were deposited on indium tin oxide/quartz substrates by reactive magnetron sputtering. Colored…”
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Nitrogen-doped titanium dioxide as visible-light-sensitive photocatalyst: designs, developments, and prospects by Asahi, Ryoji, Morikawa, Takeshi, Irie, Hiroshi, Ohwaki, Takeshi

“…Asahi et al explore the designs, developments and prospects of nitrogen-doped titanium dioxide as a visible-light-sensitive photocatalyst. They focus on topics…”
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Trap levels in tris(8-hydroxyquinoline) aluminum studied by deep-level optical spectroscopy by Nakano, Yoshitaka, Noda, Koji, Fujikawa, Hisayoshi, Morikawa, Takeshi, Ohwaki, Takeshi, Taga, Yasunori

“…We have investigated band gap states in tris(8-hydroxyquinoline) aluminum on fabricated indium tin oxide∕Alq3∕LiF∕Al devices by using a deep-level optical…”
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UV Photoemission Study of AlGaN Grown by Metalorganic Vapor Phase Epitaxy by Takahiro Kozawa, Takahiro Kozawa, Tomohiko Mori, Tomohiko Mori, Takeshi Ohwaki, Takeshi Ohwaki, Yasunori Taga, Yasunori Taga, Nobuhiko Sawaki, Nobuhiko Sawaki

“…The electronic surface properties of Al x Ga 1- x N have been studied with ultraviolet photoemission spectroscopy (UPS). Samples were grown by metalorganic…”
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Enhanced photocatalytic activity of TiO2-xNx loaded with copper ions under visible light irradiation by MORIKAWA, Takeshi, IROKAWA, Yoshihiro, OHWAKI, Takeshi

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Characterization of silicon native oxide formed in SC-1, H2O2 and wet ozone processes by OHWAKI, T, TAKEDA, M, TAKAI, Y

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Visible-light-induced photocatalytic oxidation of carboxylic acids and aldehydes over N-doped TiO2 loaded with Fe, Cu or Pt by Morikawa, Takeshi, Ohwaki, Takeshi, Suzuki, Ken-ichi, Moribe, Shinya, Tero-Kubota, Shozo

“…The rates of photocatalytic oxidation of gaseous formic acid, acetic acid, acetaldehyde and toluene over N-doped TiO2 (TiO2−xNx) loaded with Fe, Cu or Pt were…”
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Charge-Carrier Dynamics in Cu- or Fe-Loaded Nitrogen-Doped TiO 2 Powder Studied by Femtosecond Diffuse Reflectance Spectroscopy by Yamanaka, Ken-ichi, Ohwaki, Takeshi, Morikawa, Takeshi

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Infrared Absorption at Longitudinal Optical Frequency in Amorphous Oxides and Their Mixtures by Ohwaki, Takeshi, Onishi, Takashi

“…Infrared absorption at longitudinal optical (LO) frequency was measured in amorphous aluminum oxide, amorphous magnesium oxide and their mixtures. It was found…”
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Origin of visible-light sensitivity in N-doped TiO2 films by Nakano, Yoshitaka, Morikawa, Takeshi, Ohwaki, Takeshi, Taga, Yasunori

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Chemical Structure of Aluminum/8-Hydroxyquinoline Aluminum Interface by Isomura, Noritake, Mitsuoka, Takuya, Ohwaki, Takeshi, Taga, Yasunori

“…The chemical structure of interfaces between aluminum (Al) and 8-hydroxyquinoline aluminum (Alq 3 ) has been studied by X-ray photoelectron spectroscopy (XPS)…”
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Interfacial stability between Ta-Sn-O films and indium tin oxide electrodes by SATOH, T, FUJIKAWA, H, ISHII, M, OHWAKI, T, TAGA, Y

“…Interfacial structures between Ta 2 O 5 –SnO 2 (Ta–Sn–O) films and indium tin oxide (ITO) electrodes were studied using transmission electron microscopy (TEM)…”
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