Inorganic impurity effect on the photoinduced hydrophilic conversion on ultrasmooth SrTiO3 and TiO2 single crystal surfaces

Masao Katayama, Takayuki Miyakawa, Takeo Ohsawa, Jun Kuwano, Hideomi Koinuma, Yuji Matsumoto

Research output: Contribution to journalArticle

Abstract

We report the effect of inorganic impurities on the photoinduced hydrophilic conversion on ultrasmooth SrTiO3 and TiO2 single crystal surfaces. A water droplet became well spread over on a TiO 2-terminated SrTiO3(100) surface after UV irradiation, whereas it remained beaded on a SrO-terminated SrTiO3(100) surfaces. ZnP and CuO impurities deposited onto a rutile TiO2(110) surfaces were found to suppress the hydrophilic conversion with increasing amounts of ZnP and CuO. No hydrophilicity characteristic of TiO2 was observed after UV irradiation at a nominal impurity thickness of only 5 Å, indicating that the surface-exposed atomic layer plays a crucial role in photoinduced hydrophilic conversion.

Original languageEnglish
Pages (from-to)L562-L564
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume46
Issue number20-24
DOIs
Publication statusPublished - 2007 Jun 15
Externally publishedYes

Keywords

  • Hydrophilic conversion
  • Rutile
  • SrTiO
  • TiO
  • Ultrasmooth surface

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Inorganic impurity effect on the photoinduced hydrophilic conversion on ultrasmooth SrTiO<sub>3</sub> and TiO<sub>2</sub> single crystal surfaces'. Together they form a unique fingerprint.

  • Cite this