Journal
LANGMUIR
Volume 21, Issue 7, Pages 2665-2667Publisher
AMER CHEMICAL SOC
DOI: 10.1021/la050275y
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The fabrication of a superhydrophobic surface is demonstrated via a wet chemical route, and this method offers advantages of being cleanroom free, cost efficiency, and wide applicability. The preferable growth of ZnO crystalline forms a microstructured surface, and a variety of alkanoic acids were adopted to tune the surface wettability. Although all surfaces show an advancing contact angle greater than 150 degrees, they substantially differ in the wetting mechanisms. It is found that only when the length of alkanoic acid is greater than 16, the microstructured surface shows a stable superhydrophobicity, in which the Cassie state dominates. While for those moderate-length alkanoic acids (CS-C14), their corresponding surfaces have a tendency to fall into the Wenzel state and display a great contact angle hysteresis.
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