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http://dx.doi.org/10.4313/JKEM.2020.33.4.249

Enhancement of Hydrophobicity by a Heat Treatment of Zinc Aluminate Thin Film Deposited on Glass Substrate  

Seo, Sang-Young (Department of Materials Science Engineering, Chungnam National University)
Yoon, Soon-Gil (Department of Materials Science Engineering, Chungnam National University)
Publication Information
Journal of the Korean Institute of Electrical and Electronic Material Engineers / v.33, no.4, 2020 , pp. 249-254 More about this Journal
Abstract
An 80 nm thick zinc aluminate thin film was deposited on a glass substrate via radio-frequency (rf) magnetron sputtering and heat treated to analyze changes in the wetting angles due to a surface modification. The thin films were modified from hydrophilic to hydrophobic by a simple thermal treatment. The surface modification from a heat treatment increased the wetting angles up to 111°, which was explained by the relationship with the excess surface area. The wetting angles of the annealed thin films decreased with increasing exposure time under ambient conditions, which was attributed to the oxygen vacancies in the films that were introduced during deposition. The annealed thin films were treated by ionized oxygen via oxygen plasma. After the oxygen plasma treatment, the decreased wetting angles were maintained at ~95° for 11 days.
Keywords
Zinc-aluminate; Hydrophobicity; Surface area; Oxygen vacancy; Oxygen plasma treatment;
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