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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 C 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 C 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 C and 200 C 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.
ZnO micro / nano complex structure films, including reticulate papillary nodes, petal-like and flake-holes, 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 C 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 C 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 C and 200 C 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.