Photoinduced hardness change on TiO2 single crystal surfaces

Tatsuo Shibata; Hiroshi Irie; Kazuhito Hashimoto

doi:10.1039/B903084K

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Photoinduced hardness change on TiO₂ single crystal surfaces†

Tatsuo Shibata,^a Hiroshi Irie*^b and Kazuhito Hashimoto*^ac

Author affiliations

* Corresponding authors

^a Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan

^b Clean Energy Research Center, University of Yamanashi, 4-3-11 Takeda, Kofu, Yamanashi 400-8511, Japan
E-mail: hirie@yamanashi.ac.jp
Fax: +81 55 220 8092
Tel: +81 55 220 8092

^c Research Center for Advanced Science and Technology (RCAST), The University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan

Abstract

The dynamic hardness of rutileTiO₂ single crystal surfaces was investigated using a nanoindentation technique and the hardness increase was observed only in the near-surface region, possibly due to the volume expansion accompanied by the photoinduced high hydrophilicity.

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Supplementary files

The trace size produced by a diamond nanoindenter. Changes indynamic hardness of rutile (110) and (001) single crystals. Thebond length increase when introducing the hydroxyl groups.Schematic illustrations for the generation of the compressivestress and the increase in the hardness. XPS spectra of O 1s forthe rutile single crystal surface PDF (440K)

Article information

DOI: https://doi.org/10.1039/B903084K
Article type: Communication
Submitted: 17 Feb 2009
Accepted: 14 Apr 2009
First published: 18 May 2009

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Chem. Commun., 2009, 3735-3737

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Photoinduced hardness change on TiO₂ single crystal surfaces

T. Shibata, H. Irie and K. Hashimoto, Chem. Commun., 2009, 3735 DOI: 10.1039/B903084K

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