Nano Research

, Volume 2, Issue 2, pp 143–150

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

  • Yong Song
  • Rahul Premachandran Nair
  • Min Zou
  • Yongqiang Wang
Open Access
Research Article

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° were obtained, as compared to the WCAs of OTS-modified smooth silicon surfaces of about 112°. Surface topography was found to directly influence the WCA as predicted by the Cassie-Baxter model.

Keywords

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

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Copyright information

© Tsinghua University Press and Springer Berlin Heidelberg 2009

Authors and Affiliations

  • Yong Song
    • 1
  • Rahul Premachandran Nair
    • 1
  • Min Zou
    • 1
  • Yongqiang Wang
    • 2
  1. 1.Department of Mechanical EngineeringUniversity of ArkansasFayettevilleUSA
  2. 2.Ocean NanoTech, LLC.SpringdaleUSA

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