Photoinduced surface roughness variation in polycrystalline TiO2 thin films under different atmospheres

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

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


For this study, we evaluated photoinduced surface roughness variation of polycrystalline anatase thin films under different atmospheres using atomic force microscopy (AFM). A TiO2 thin film with large grains was prepared using the sol-gel process and vacuum ultraviolet (VUV) irradiation before firing. Upon UV illumination, the surface image became blurred with an apparent surface roughness increase in ambient air. The appearance of this image change was delayed in dry air, and was not observed in dry nitrogen. These results imply that this photoinduced surface change is related to water adsorption from the atmosphere.

Original languageEnglish
Pages (from-to)53-57
Number of pages5
JournalJournal of Photochemistry and Photobiology A: Chemistry
Issue number1
Publication statusPublished - Jul 5 2007
Externally publishedYes


  • Atomic force microscopy
  • Surface roughness
  • Titanium dioxide

ASJC Scopus subject areas

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


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