Ville Liimatainen, Veikko Sariola and Quan Zhou Controlling Liquid Spreading Using Microfabricated Undercut Edges Advanced Materials 25
A purely topographical method for controlling liquid spreading by using easy-to-fabricate undercut edges is reported. By periodic repetition of such edges, it is shown that multiple droplets can be patterned in well-controlled shapes, and highly anisotropic wetting can also be achieved at a large scale. Apparent contact angles close to 180° at the edge are shown, even for low surface tension liquids.
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