%0 Journal Article
%T Fabrication of Super-Hydrophobic Microchannels via Strain-Recovery Deformations of Polystyrene and Oxygen Reactive Ion Etch
%A Anirban Chakraborty
%A Mingming Xiang
%A Cheng Luo
%J Materials
%D 2013
%I MDPI AG
%R 10.3390/ma6083610
%X In this article, we report a simple approach to generate micropillars (whose top portions are covered by sub-micron wrinkles) on the inner surfaces of polystyrene (PS) microchannels, as well as on the top surface of the PS substrate, based on strain-recovery deformations of the PS and oxygen reactive ion etch (ORIE). Using this approach, two types of micropillar-covered microchannels are fabricated. Their widths range from 118 ¦Ìm to 132 ¦Ìm, depths vary from 40 ¦Ìm to 44 ¦Ìm, and the inclined angles of their sidewalls are from 53¡ã to 64¡ã. The micropillars enable these microchannels to have super-hydrophobic properties. The contact angles observed on the channel-structured surfaces are above 162¡ã, and the tilt angles to make water drops roll off from these channel-structured substrates can be as small as 1¡ã.
%K shape-memory polymer
%K super-hydrophobic microchannels
%K hybrid micro/nanostructures
%U http://www.mdpi.com/1996-1944/6/8/3610