Tuning Hydrophobicity with Honeycomb Surface Structure and Hydrophilicity with CF4 Plasma Etching for Aerosol-Deposited Titania Films

Title
Tuning Hydrophobicity with Honeycomb Surface Structure and Hydrophilicity with CF4 Plasma Etching for Aerosol-Deposited Titania Films
Authors
이민욱Do-Yeon KimJung-Jae ParkJong-Gun LeeHo-Young KimJoon-Ho OhTae-Yeon SeongDonghwan KimMaikel F. A. M. van HestSanjeev ChandraSam S. YoonScott C. James
Issue Date
2012-12
Publisher
Journal of the American Ceramic Society
Citation
VOL 95, NO 12-3961
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 TiO2 films between 1 and 18 mu m thick are produced by directly depositing dry, 1-mu m 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.
URI
http://pubs.kist.re.kr/handle/201004/66133
ISSN
0002-7820
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KIST Publication > Article
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