Intrinsic Nature of Interfacial Interactions between Ionic Liquids and Rutile TiO2 Single Crystal Surfaces Studied by in Situ Contact Angle Measurement in a Vacuum

研究成果: Article査読

4 被引用数 (Scopus)

抄録

In situ contact angle measurements of ionic liquids (ILs) on well-defined rutile TiO2 single crystal surfaces with various treatments were performed in a vacuum by a sessile drop method. The contact angles of ILs on the clean TiO2 surfaces prepared in vacuum were significantly smaller than on those contaminated with airborne hydrocarbon. As a result, there was revealed a different correlation in Zisman's plots of the hydrophobic and hydrophilic ILs, which was further confirmed by their different wettability change on the hydrophilized TiO2 surface with UV light treatment in air. In addition, the critical surface tension on the vacuum-annealed TiO2 surface was lower than on the initial clean surface. These results will be qualitatively discussed by considering the polar and apolar interactions at the interface between ILs and TiO2.

本文言語English
ページ(範囲)17755-17761
ページ数7
ジャーナルJournal of Physical Chemistry C
119
31
DOI
出版ステータスPublished - 2015 8 6

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

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