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

Paper ID Volume ID Publish Year Pages File Format Full-Text
28120 44060 2009 6 PDF Available
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.

Keywords
Titanium dioxide; Polycrystalline thin films; Friction; Atomic force microscopy
First Page Preview
Dependence of photoinduced surface friction force variation on UV intensity and atmosphere in polycrystalline TiO2 thin films
Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 203, Issues 2–3, 15 April 2009, Pages 155–160
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering