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Photo-Switchable Surface Topologies in Chiral Nematic Coatings

Authors

  • Danqing Liu,

    Corresponding author
    1. Department of Functional Organic Materials and Devices, Chemical Engineering and Chemistry, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven (The Netherlands)
    2. Department of Polymer Technology, Mechanical Engineering, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven (The Netherlands)
    • Department of Functional Organic Materials and Devices, Chemical Engineering and Chemistry, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven (The Netherlands)
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  • Dr. Cees W. M. Bastiaansen,

    1. Department of Functional Organic Materials and Devices, Chemical Engineering and Chemistry, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven (The Netherlands)
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  • Dr. Jaap M. J. den Toonder,

    1. Department of Polymer Technology, Mechanical Engineering, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven (The Netherlands)
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  • Dr. Dirk J. Broer

    Corresponding author
    1. Department of Functional Organic Materials and Devices, Chemical Engineering and Chemistry, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven (The Netherlands)
    • Department of Functional Organic Materials and Devices, Chemical Engineering and Chemistry, Eindhoven University of Technology, Den Dolech 2, 5612 AZ Eindhoven (The Netherlands)
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  • The authors acknowledge the Dutch Polymer Institute (DPI) for sponsoring their research.

Abstract

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An enlightening answer: Dynamic surface photo-responsive topologies of a polymer coating were realized by introducing azobenzene crosslinkers into liquid-crystal polymer networks (see picture). The principle of these coatings is based on breaking the molecular order in the liquid-crystal polymer networks. Under irradiation of UV light the azobenzene compound isomerizes from the trans to the cis conformation.

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