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      Designing superoleophobic surfaces.

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          Abstract

          Understanding the complementary roles of surface energy and roughness on natural nonwetting surfaces has led to the development of a number of biomimetic superhydrophobic surfaces, which exhibit apparent contact angles with water greater than 150 degrees and low contact angle hysteresis. However, superoleophobic surfaces-those that display contact angles greater than 150 degrees with organic liquids having appreciably lower surface tensions than that of water-are extremely rare. Calculations suggest that creating such a surface would require a surface energy lower than that of any known material. We show how a third factor, re-entrant surface curvature, in conjunction with chemical composition and roughened texture, can be used to design surfaces that display extreme resistance to wetting from a number of liquids with low surface tension, including alkanes such as decane and octane.

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          Author and article information

          Journal
          Science
          Science (New York, N.Y.)
          American Association for the Advancement of Science (AAAS)
          1095-9203
          0036-8075
          Dec 07 2007
          : 318
          : 5856
          Affiliations
          [1 ] Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
          Article
          318/5856/1618
          10.1126/science.1148326
          18063796
          930b4e24-60bc-4666-b18b-45924791953f
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