Advanced Materials

Controlling Liquid Spreading Using Microfabricated Undercut Edges (Adv. Mater. 16/2013)

Authors

  • Ville Liimatainen,

    1. Department of Automation and Systems Technology, School of Electrical Engineering, Aalto University, Otaniementie 17, Espoo 02150, Finland
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  • Veikko Sariola,

    1. Department of Automation and Systems Technology, School of Electrical Engineering, Aalto University, Otaniementie 17, Espoo 02150, Finland
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  • Quan Zhou

    Corresponding author
    1. Department of Automation and Systems Technology, School of Electrical Engineering, Aalto University, Otaniementie 17, Espoo 02150, Finland
    • Department of Automation and Systems Technology, School of Electrical Engineering, Aalto University, Otaniementie 17, Espoo 02150, Finland.
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Abstract

A purely topographical structure can be used for controlling liquid spreading on surfaces, as reported by Quan Zhou and co-workers on page 2275. The method exploits easy-to-fabricate undercut edges to confine micro- and macroscale droplets and to control surface-microfluidic flow. The edges exhibit close to 180° contact angles even for low surface tension liquids, leading to highly anisotropic wetting at large scale.

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