Superhydrophobic surfaces via controlling the morphology of ZnO micro/nano complex structure

• Published in: Chinese physics B Vol. 19; no. 5; pp. 466 - 471
• Main Author: 公茂刚 许小亮 杨周 刘艳松 刘玲
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.05.2010
• Subjects: Contact angle; Morphology; Nanocomposites; Nanomaterials; Nanostructure; Toluene; Wettability; Zinc oxide; ZnO薄膜; 微形貌; 氧化锌薄膜; 水接触角; 疏水表面; 纳米复合结构; 表面生长
• ISSN: 1674-1056; 2058-3834
• DOI: 10.1088/1674-1056/19/5/056701

ZnO micro/nano complex structure films, including reticulate papillary nodes, petal-like and flake-hole, have been self-assembled by a hydrothermal technique at different temperatures without metal catalysts. The wettability of the above film surfaces was modified with a simple coating of heptadecafluorodecyltrimethoxy-silane in toluene. After modifying, the surface of ZnO film grown at 50℃ was converted from superhydrophilic with a water contact angle lower than 5° to superhydrophobic with a water contact angle of 165° Additionally, the surface of reticulate papillary nodes ZnO film grown at 100 ℃ had excellent superhydrophobicity, with a water contact angle of 173° and a sliding angle lower than 2° Furthermore, the water contact angle on the surface of petal-like and flake-hole ZnO films grown at 150℃ and 200℃ were found to be 140° and 120°, respectively. The wettability for the samples was found to depend strongly on the surface morphology which results from the growth temperature.