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Proceedings Paper

Combinatorial synthesis and high-throughput evaluation of doped TiO2 thin films for the development of photocatalysts
Author(s): Yuji Matsumoto; Makoto Murakami; Zhengwu Jin; Akira Nakayama; Tetsuo Yamaguchi; Takashi Ohmori; Eiji Suzuki; Satoshi Nomura; Masashi Kawasaki; Hideomi Koinuma
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Paper Abstract

TiO2 thin films doped with various transition metals were systematically fabricated by combinatorial laser MBE technique. Alternating KrF excimer laser ((lambda) equals 248 nm) ablation of TiO2 and Ti1-x MxO2 (M equals transition metal) was employed to deposit combinatorial library of 18 samples for each dopant with different concentrations. Anatase films with c-axis orientation were grown epitaxially on SrTiO3(001) substrate while the rutile phase films with a-axis orientation were on Al2O3(0001) substrate. Solid solubility of transition metals in both the phases was determined by X-ray diffraction. The anatase phase was found to dissolve the transition metals in higher concentrations than rutile phase. The parallel evaluation of the photocatalytic activity of the doped TiO2 in combinatorial libraries was performed with respect to photo-decomposition of water in presence of a small amount of oxidizing or reducing agent which induced pH changes on the pixels. The high throughput evaluation of combinatorially deposited photocatalytic thin films was realized by adopting a potentiometric pH field effect transistor for sensing such pH changes.

Paper Details

Date Published: 17 May 2000
PDF: 9 pages
Proc. SPIE 3941, Combinatorial and Composition Spread Techniques in Materials and Device Development, (17 May 2000); doi: 10.1117/12.385421
Show Author Affiliations
Yuji Matsumoto, Tokyo Institute of Technology (Japan)
Makoto Murakami, Tokyo Institute of Technology (Japan)
Zhengwu Jin, Tokyo Institute of Technology (Japan)
Akira Nakayama, Research Institute of Innovative Technology for the Earth (Japan)
Tetsuo Yamaguchi, Research Institute of Innovative Technology for the Earth (Japan)
Takashi Ohmori, Research Institute of Innovative Technology for the Earth (Japan)
Eiji Suzuki, Research Institute of Innovative Technology for the Earth (Japan)
Satoshi Nomura, HORIBA Ltd. (Japan)
Masashi Kawasaki, Tokyo Institute of Technology (Japan) and Combinatorial Materials Exploration and Technolo (Japan)
Hideomi Koinuma, Tokyo Institute of Technology (Japan), Japan Science and Technology Corp., and Combinatori (Japan)


Published in SPIE Proceedings Vol. 3941:
Combinatorial and Composition Spread Techniques in Materials and Device Development
Ghassan E. Jabbour, Editor(s)

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