From nature to engineering : artificial springtail toward robust superomniphobic surface
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초록
내용
Toward high performing and practical omniphobic surface, both high static repellency and robustness on pressure are critical. In nature, the cuticles of springtails have both of these intrinsic features. Inspite of intensive efforts, none of the previous researches inspired by the springtail were able to achieve both features at the same time because of a general trade-off between them. In here, we show for the first time a springtail-inspired high performing superomniphobic surface by fabricating a hierarchical system consisting of serif-T–shaped nanostructures on microscale wrinkles, overcoming previous challenges. We produced a surface showing high repellency to diverse liquids, from water to ethanol, with a contact angle above 150° by bimimetic engineering. Moreover, the surface was able to have extreme pressure resistance resulting from the impacts of drops of water and of ethylene glycol with We >> 200, and of ethanol with We ~ 53, which is the highest robustness ever reported.