Photoinduced surface roughness variation in polycrystalline TiO2 thin films

Ken ichi Katsumata, Akira Nakajima, Tadashi Shiota, Naoya Yoshida, Toshiya Watanabe, Yoshikazu Kameshima, Kiyoshi Okada

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

Photoinduced microstructural changes in transparent anatase thin films with large-grain polycrystallites (-200 nm) were evaluated using atomic force microscopy (AFM). Films were subjected to a vacuum ultraviolet (VUV) pretreatment before heating at 500 °C. Photoinduced wettability of the films was subsequently confirmed. Upon UV illumination, the surface image became blurred with an apparent increased surface roughness. The image sharpened gradually as the surface returned to its initial state. This microstructural surface change is most pronounced at grain boundaries.

Original languageEnglish
Pages (from-to)75-79
Number of pages5
JournalJournal of Photochemistry and Photobiology A: Chemistry
Volume180
Issue number1-2
DOIs
Publication statusPublished - May 15 2006
Externally publishedYes

Keywords

  • Surface morphology
  • Surface roughness
  • Titanium dioxide
  • Wetting

ASJC Scopus subject areas

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

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