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A Facile Approach to Superhydrophilic–Superhydrophobic Patterns in Porous Polymer Films

Authors

  • David Zahner,

    1. Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
    2. Department of Applied Physical Chemistry, University of Heidelberg, 69120 Heidelberg, Germany
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  • Joselle Abagat,

    1. College of Chemistry, University of California Berkeley, Berkeley, CA 94720-1460, USA
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  • Frank Svec,

    1. The Molecular Foundry, E.O. Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
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  • Jean M. J. Fréchet,

    1. College of Chemistry, University of California Berkeley, Berkeley, CA 94720-1460, USA
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  • Pavel A. Levkin

    Corresponding author
    1. Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany
    2. Department of Applied Physical Chemistry, University of Heidelberg, 69120 Heidelberg, Germany
    • Institute of Toxicology and Genetics, Karlsruhe Institute of Technology, 76021 Karlsruhe, Germany.
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Abstract

original image

A facile and versatile method for creating superhydrophilic patterns in superhydrophobic porous polymer films by UV-initiated photografting is presented. The extreme difference in wettability between superhydrophilic and superhydrophobic areas allows the use of the superhydrophilic patterns as virtual microfluidic channels. The method allows for precise control of the size and geometry of photografted superhydrophilic features, and the thickness, morphology, and transparency of the superhydrophobic and hydrophobic porous polymer films.

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