Microstructure and superhydrophilicity of anodic TiO2 films on pure titanium

N. Masahashi, S. Semboshi, N. Ohtsu, M. Oku

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

The superhydrophilicity of TiO2 prepared by anodization of pure titanium was investigated and the underlying mechanism was explored. The water contact angle of the as-anodized oxide decreases with the conversion voltage and ultraviolet (UV) light illumination, whereas the annealed oxide exhibits further low contact angles regardless of the conversion voltage and UV illumination. The O 1s X-ray photoelectron spectroscopy spectra of the oxides have a shoulder peak due to adsorption of hydroxyl groups and the intensity of the peak increases with annealing and UV illumination; these observations suggest that the interaction between the surface of the oxide and the hydroxyl groups is enhanced.

Original languageEnglish
Pages (from-to)7488-7496
Number of pages9
JournalThin Solid Films
Volume516
Issue number21
DOIs
Publication statusPublished - 2008 Sep 1

Keywords

  • Anodic oxidation
  • Crystal structure
  • Superhydrophilicity
  • Titanium oxide
  • X-ray photoelectron spectroscopy

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

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