Abstract
Superhydrophobic surface is commonly fabricated by a combination of micro- and nano-scale structure and low surface energy materials. In this paper we fabricated a lotus leaves-like ZnO nano-forest surface by alkaline hydrothermal method, and the formation of micro- and nano-scale structured surface is controlled by the growth of the ZnO nanoseed layer. The growing ZnO nano-forest exhibits a perfect superhydrophilicity with a low water droplet CA about 1°. After modification with Teflon AF, the surface exhibits a superhydrophobicity with a water CA above 170°. The method is simply controllable, cost-effective, and has a wide range of potential applications such as self-cleaning superhydrophobic coating on large areas of different substrates.
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