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Nano Research

Article Title

Superhydrophobic surfaces produced by applying a self-assembled monolayer to silicon micro/nano-textured surfaces

Keywords

Superhydrophobic, wetting property, micro/nano-textured surfaces, octadecyltrichlorosilane, self-assembled monolayer, aluminum-induced crystallization of amorphous silicon

Abstract

A novel way of producing superhydrophobic surfaces by applying a self-assembled monolayer (SAM) to / / silicon micro nano-textured surfaces is presented in this paper. The micro nano-textured surfaces on silicon substrates were generated by the aluminum-induced crystallization (AIC) of amorphous silicon (a-Si) technique. Octadecyltrichlorosilane (OTS) SAMs were then applied to the textured surfaces by dip coating. The topography and wetting properties of the resulting surfaces were characterized using scanning electron microscopy (SEM) and a video-based contact angle measurement system. The results show that by introducing OTS SAMs on the silicon micro/nano-textured surfaces, superhydrophobic surfaces with water contact angles (WCAs) of 155!a were obtained, as compared to the WCAs of OTS-mod? ed smooth silicon surfaces of about 112!a. Surface topography was found to directly i? uence the WCA as predicted by the Cassie-Baxter model.

Graphical Abstract

Publisher

Tsinghua University Press

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