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  • Title: Super-hydrophobic, highly adhesive, polydimethylsiloxane (PDMS) surfaces.
    Author: Stanton MM, Ducker RE, MacDonald JC, Lambert CR, McGimpsey WG.
    Journal: J Colloid Interface Sci; 2012 Feb 01; 367(1):502-8. PubMed ID: 22129630.
    Abstract:
    Super-hydrophobic surfaces have been fabricated by casting polydimethylsiloxane (PDMS) on a textured substrate of known surface topography, and were characterized using contact angle, atomic force microscopy, surface free energy calculations, and adhesion measurements. The resulting PDMS has a micro-textured surface with a static contact angle of 153.5° and a hysteresis of 27° when using de-ionized water. Unlike many super-hydrophobic materials, the textured PDMS is highly adhesive, allowing water drops as large as 25.0 μL to be inverted. This high adhesion, super-hydrophobic behavior is an illustration of the "petal effect". This rapid, reproducible technique has promising applications in transport and analysis of microvolume samples.
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