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Fabrication of Bionic Surfaces with Mixed Superhydrophobic and Superhydrophilic Properties Using fs-lasers.

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Fabrication of Bionic Surfaces with Mixed Superhydrophobic and Superhydrophilic Properties Using fs-lasers.

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  • Author: Matthias Domkea, Elisabeth Kostala, Stephan Kasemannb, Victor Matylitskyc, Sandra Stroja
The exciting functionalities of natural superhydrophobic and superhydrophilic surfaces, e.g. the extreme water repellency of the lotus flower, served as inspiration for a variety of bionic designs. In recent years, it was successfully demonstrated that either superhydrophobic or superhydrophilic surfaces could be fabricated by laser micromachining, as e.g. shown by Kietzig et al. (2009), Vorobyev and Guo (2015), and Baldacchini et al. (2006). In contrast, little attention has been paid to combine both extreme wetting states to micro patterns. However, as Garrod et al. (2007) showed, superhydrophobic/ superhydrophilic micro patterns, as on the elytra of the fog-collecting Namib Desert beetle, increase the water collection efficiency from fog. The aim of this study was to use laser micromachining to fabricate similar superhydrophobic/superhydrophilic micro patterns on glass.

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