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Microstructured Surfaces for Directional Wetting

Authors

  • Ville Jokinen,

    Corresponding author
    1. Protein Chemistry Unit, Institute of Biomedicine University of Helsinki Haartmaninkatu 8, P. O. Box 63, 00014 (Finland)
    • Protein Chemistry Unit, Institute of Biomedicine University of Helsinki Haartmaninkatu 8, P. O. Box 63, 00014 (Finland).
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  • Marianne Leinikka,

    1. Department of Micro and Nanosciences Helsinki University of Technology FIN-02015 TKK (Finland)
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  • Sami Franssila

    Corresponding author
    1. Department of Micro and Nanosciences Helsinki University of Technology FIN-02015 TKK (Finland)
    • Department of Micro and Nanosciences Helsinki University of Technology FIN-02015 TKK (Finland).
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Abstract

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Directional wetting on limited sectors of surfaces is achieved on partially wetting microstructured surfaces by placing nonsymmetrical microstructures in a regular rectangular lattice. Droplet spreading to a 90° sector is possible when the microstructures are designed to present broad features towards the right and top and sharp features towards the left and bottom (see image).

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