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Journal Articles

Preparation of epitaxial TiO$$_{2}$$ films by PLD for photocatalyst applications

Yamaki, Tetsuya; Sumita, Taishi; Yamamoto, Shunya; Miyashita, Atsumi

Journal of Crystal Growth, 237-239(Part1), p.574 - 579, 2002/04

Pulsed laser deposition (PLD) with a KrF excimer laser was used to prepare epitaxial TiO$$_{2}$$ films on a (0001) sapphire substrate. The crystalline structure and surface morphology of the films were then investigated as a function of the laser power density in the PLD. X-ray diffraction and Raman spectroscopy results showed that the films were composed of the (100) oriented rutile phase with a small amount of the (001) oriented anatase. The anatase-to-rutile ratio in such phase-mixed films was controlled by the laser power; the ratio increased as the power density decreased. From atomic force microscopy observations, the film deposited at the lowest power was found to have a rough surface consisting of coarse grains. This film exhibited the best photocatalytic performance during the decomposition of the organic dyes possibly due to the maximum relative content of anatase and the large surface area.

Journal Articles

Pulsed laser deposition of ilmenite FeTiO$$_{3}$$ epitaxial thin film onto sapphire substrate

Dai, Z.*; P.Zhu*; Yamamoto, Shunya; Miyashita, Atsumi; Narumi, Kazumasa; Naramoto, Hiroshi

Thin Solid Films, 339(1-2), p.114 - 116, 1999/00

 Times Cited Count:26 Percentile:77.41(Materials Science, Multidisciplinary)

no abstracts in English

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