Superoleophobic surfaces and methods of making same
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United States of America Patent
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Sep 13, 2016
Grant Date -
Jun 4, 2015
app pub date -
Jun 18, 2013
filing date -
Jun 18, 2012
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Abstract
Disclosed herein is a substrate having a surface modified to impart multi-scale roughness, thereby providing superhydrophobic and/or superoleophobic properties. The surface comprises a pattern of microscale pillars topped by a plurality of nanoparticles having a re-entrant convex shape. The area fraction of the surface is also selected to provide the desired superoleophobic properties. Also disclosed herein is a process for creating the modified surface comprising photolithography, optionally followed by vapor deposition. The substrates may be formed into useful articles or applied to pre-formed articles.
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