Hydrophilicity of TiO2 thin films obtained by RF magnetron sputtering deposition

Xiu Tian Zhao, Kenji Sakka, Naoto Kihara, Yasuyuki Takata, Makoto Arita, Masataka Masuda

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Titanium dioxide thin films were deposited on stainless steel substrates by radio frequency (RF) magnetron sputtering method. The relative humidity (RH) and oxygen content of the environment were varied systematically. The hydrophilicity of the films under ultraviolet (UV) irradiation was investigated. It was found that the hydrophilicity of the films was strongly affected by the RH and the oxygen content of the environment. This would be attributable to the adsorption of oxygen and hydroxyl group and the recombination of the electron-hole pair would be affected by the adsorbed species too. In the X-ray photoelectron spectroscopy (XPS) experiment, we succeeded in measuring the effect of UV irradiation using helium light source of ultraviolet photoelectron spectroscopy (UPS). The XPS analysis revealed that under UV irradiation, Ti3+ was produced and the adsorption of hydroxyl groups on the surface of TiO2 films was increased. The titanium dioxide films were characterized by X-ray diffraction (XRD) and atomic force microscopy (AFM).

Original languageEnglish
Pages (from-to)931-933
Number of pages3
JournalCurrent Applied Physics
Volume6
Issue number5
DOIs
Publication statusPublished - Sep 1 2006

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Physics and Astronomy(all)

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