Dependence of photoinduced surface friction force variation on UV intensity and atmosphere in polycrystalline TiO2 thin films

Naoki Arimitsu; Akira Nakajima; Toshiya Watanabe; Yoshikazu Kameshima; Kiyoshi Okada

doi:10.1016/j.jphotochem.2009.01.009

Dependence of photoinduced surface friction force variation on UV intensity and atmosphere in polycrystalline TiO₂ thin films

Naoki Arimitsu, Akira Nakajima, Toshiya Watanabe, Yoshikazu Kameshima, Kiyoshi Okada

Research output: Contribution to journal › Article › peer-review

6 Citations (Scopus)

Abstract

Anatase polycrystalline thin films and a plasma crystallization process were used to investigate the dependence of the photoinduced friction force variation for a TiO₂ surface on the UV intensity and atmosphere. Photoinduced friction force variation for UV illumination time was divisible into two stages, decreasing and increasing, where the switching time between these two stages and the degree of variation depended on the UV intensity and atmosphere. The decreasing stage was attributable to the photocatalytic decomposition of organic compound adsorbed onto the surface, whereas the increasing stage was attributed to the capillary effect or an increase in the adsorbed water layer. Results demonstrated that UV intensity and atmosphere controlled the friction force.

Original language	English
Pages (from-to)	155-160
Number of pages	6
Journal	Journal of Photochemistry and Photobiology A: Chemistry
Volume	203
Issue number	2-3
DOIs	https://doi.org/10.1016/j.jphotochem.2009.01.009
Publication status	Published - Apr 15 2009
Externally published	Yes

Keywords

Atomic force microscopy
Friction
Polycrystalline thin films
Titanium dioxide

ASJC Scopus subject areas

Chemistry(all)
Chemical Engineering(all)
Physics and Astronomy(all)

Access to Document

10.1016/j.jphotochem.2009.01.009

Cite this

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title = "Dependence of photoinduced surface friction force variation on UV intensity and atmosphere in polycrystalline TiO2 thin films",

abstract = "Anatase polycrystalline thin films and a plasma crystallization process were used to investigate the dependence of the photoinduced friction force variation for a TiO2 surface on the UV intensity and atmosphere. Photoinduced friction force variation for UV illumination time was divisible into two stages, decreasing and increasing, where the switching time between these two stages and the degree of variation depended on the UV intensity and atmosphere. The decreasing stage was attributable to the photocatalytic decomposition of organic compound adsorbed onto the surface, whereas the increasing stage was attributed to the capillary effect or an increase in the adsorbed water layer. Results demonstrated that UV intensity and atmosphere controlled the friction force.",

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T1 - Dependence of photoinduced surface friction force variation on UV intensity and atmosphere in polycrystalline TiO2 thin films

AU - Arimitsu, Naoki

AU - Nakajima, Akira

AU - Watanabe, Toshiya

AU - Kameshima, Yoshikazu

AU - Okada, Kiyoshi

PY - 2009/4/15

Y1 - 2009/4/15

N2 - Anatase polycrystalline thin films and a plasma crystallization process were used to investigate the dependence of the photoinduced friction force variation for a TiO2 surface on the UV intensity and atmosphere. Photoinduced friction force variation for UV illumination time was divisible into two stages, decreasing and increasing, where the switching time between these two stages and the degree of variation depended on the UV intensity and atmosphere. The decreasing stage was attributable to the photocatalytic decomposition of organic compound adsorbed onto the surface, whereas the increasing stage was attributed to the capillary effect or an increase in the adsorbed water layer. Results demonstrated that UV intensity and atmosphere controlled the friction force.

AB - Anatase polycrystalline thin films and a plasma crystallization process were used to investigate the dependence of the photoinduced friction force variation for a TiO2 surface on the UV intensity and atmosphere. Photoinduced friction force variation for UV illumination time was divisible into two stages, decreasing and increasing, where the switching time between these two stages and the degree of variation depended on the UV intensity and atmosphere. The decreasing stage was attributable to the photocatalytic decomposition of organic compound adsorbed onto the surface, whereas the increasing stage was attributed to the capillary effect or an increase in the adsorbed water layer. Results demonstrated that UV intensity and atmosphere controlled the friction force.

KW - Atomic force microscopy

KW - Friction

KW - Polycrystalline thin films

KW - Titanium dioxide

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