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Superhydrophobic surfaces via controlling the morphology of ZnO micro/nano complex structure |
Gong Mao-Gang(公茂刚)†, Xu Xiao-Liang(许小亮)‡, Yang Zhou(杨周), Liu Yan-Song(刘艳松), and Liu Ling(刘玲) |
Department of Physics, University of Science and Technology of China, Hefei 230026, China |
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Abstract 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 ${^\circ}$C was converted from superhydrophilic with a water contact angle lower than 5$^{\circ}$ to superhydrophobic with a water contact angle of 165$^{\circ}$. Additionally, the surface of reticulate papillary nodes ZnO film grown at 100 ${^\circ}$C had excellent superhydrophobicity, with a water contact angle of 173$^{\circ}$ and a sliding angle lower than 2$^{\circ}$. Furthermore, the water contact angle on the surface of petal-like and flake-hole ZnO films grown at 150 ${^\circ}$C and 200 ${^\circ}$C were found to be 140$^{\circ}$ and 120$^{\circ}$, respectively. The wettability for the samples was found to depend strongly on the surface morphology which results from the growth temperature.
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Received: 28 October 2009
Revised: 23 November 2009
Accepted manuscript online:
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PACS:
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68.55.-a
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(Thin film structure and morphology)
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81.16.Dn
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(Self-assembly)
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68.55.A-
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(Nucleation and growth)
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68.37.Hk
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(Scanning electron microscopy (SEM) (including EBIC))
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68.08.Bc
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(Wetting)
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Fund: Project supported by the 973 Program of China (Grant No.~2006CB302900) and National Natural Science Foundation of China (Grant No.~50872129). |
Cite this article:
Gong Mao-Gang(公茂刚), Xu Xiao-Liang(许小亮), Yang Zhou(杨周), Liu Yan-Song(刘艳松), and Liu Ling(刘玲) Superhydrophobic surfaces via controlling the morphology of ZnO micro/nano complex structure 2010 Chin. Phys. B 19 056701
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