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Issue 17, 2014
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Superhydrophobicity of hierarchical ZnO nanowire coatings

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Hierarchical superhydrophobic surfaces were constructed by growing various lengths of ZnO nanowires on micro-scale Si pyramids produced by chemical etching. The nano-size effect on wettability of nano/micro complex structures has been investigated by adjusting the ZnO nanowire length. As the nanowire length on the Si pyramid surface increases, a transition from the Wenzel state to the Cassie state occurs. A water contact angle as high as 169.1°, with a contact angle hysteresis less than 1.3°, was formed by growing ZnO nanowires of a suitable length on Si micro-pyramids. Compression and impact experiments further demonstrate the robust superhydrophobicity of ZnO nanowire–Si pyramid hierarchical structures.

Graphical abstract: Superhydrophobicity of hierarchical ZnO nanowire coatings

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The article was received on 12 Oct 2013, accepted on 17 Dec 2013 and first published on 18 Dec 2013

Article type: Paper
DOI: 10.1039/C3TA14102K
J. Mater. Chem. A, 2014,2, 6180-6184

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    Superhydrophobicity of hierarchical ZnO nanowire coatings

    M. Gong, Z. Yang, X. Xu, D. Jasion, S. Mou, H. Zhang, Y. Long and S. Ren, J. Mater. Chem. A, 2014, 2, 6180
    DOI: 10.1039/C3TA14102K

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