Microstructure and superhydrophilicity of anodic TiO2 films on pure titanium

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

Research output: Contribution to journalArticle

31 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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