Abstract

Superhydrophobic surface is commonly fabricated by a combination of micro- and nano-scale structure and low surface energy materials. In this paper, superhydrophobic ZnO surfaces with controllable water adhesion have been fabricated by combining both a simple hydrothermal process and self-assembly of stearic acid. We regulate the hydrothermal process by using different zinc salt aqueous solution to control different morphologies of ZnO surfaces. After being modified with stearic acid, the as-prepared ZnO surfaces show an analogous extreme nonwetting property but high contrast water adhesion that ranges from very high to extremely low. This simple and practical method can provide an important strategy for the adhesion adjustment on superhydrophobic surfaces.

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