Tuning hydrophobicity with honeycomb surface structure and hydrophilicity with CF 4 plasma etching for aerosol-deposited titania films

Do Yeon Kim, Jung Jae Park, Jong Gun Lee, Min Wook Lee, Ho Young Kim, Joon Ho Oh, Tae Yeon Seong, Donghwan Kim, Scott C. James, Maikel F A M Van Hest, Sanjeev Chandra, Suk Goo Yoon

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A tunable surface that promotes either hydrophobic or hydrophilic behavior of TiO2 films is produced with aerosol deposition. This process is capable of mass production by high-speed coating at room temperature without any wet chemicals, and therefore the process has the potential to be economically viable, energy efficient, and environmentally friendly. Functional TiO 2 films between 1 and 18 μm thick are produced by directly depositing dry, 1-μm TiO2 powders accelerated through a supersonic nozzle. Tunable film morphology due to a rough honeycomb surface structure yields variable water contact angles. When plasma treated with CF4, the films exhibit superhydrophilicity despite the rough honeycomb surface structure. Superhydrophilicity is due to the incorporation of fluorine in the film as shown using XPS.

Original languageEnglish
Pages (from-to)3955-3961
Number of pages7
JournalJournal of the American Ceramic Society
Volume95
Issue number12
DOIs
Publication statusPublished - 2012 Dec 1

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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