Unidirectional Wetting Properties on Multi‐Bioinspired Magnetocontrollable Slippery Microcilia |
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| Authors: | Moyuan Cao Xu Jin Yun Peng Cunming Yu Kan Li Kesong Liu Lei Jiang |
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| Affiliation: | 1. School of Chemical Engineering and Technology, State Key Laboratory of Chemical Engineering, Tianjin University, Tianjin, P. R. China;2. Research Institute of Petroleum Exploration and Development, Beijing, P. R. China;3. Key Laboratory of Bio‐Inspired Smart Interfacial Science and Technology of Ministry of Education, School of Chemistry and Environment, Beihang University, Beijing, P. R. China;4. Technical Institute of Physics and Chemistry, Key Laboratory of Bio‐Inspired Materials and Interfacial Science, Chinese Academy of Sciences, Beijing, P. R. China |
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| Abstract: | Here, a smart fluid‐controlled surface is designed, via the rational integration of the unique properties of three natural examples, i.e., the unidirectional wetting behaviors of butterfly's wing, liquid‐infused “slippery” surface of the pitcher plant, and the motile microcilia of micro‐organisms. Anisotropic wettability, lubricated surfaces, and magnetoresponsive microstructures are assembled into one unified system. The as‐prepared surface covered by tilted microcilia achieves significant unidirectional droplet adhesion and sliding. Regulating by external magnet field, the directionality of ferromagnetic microcilia can be synergistically switched, which facilitates a continuous and omnidirectional‐controllable water delivery. This work opens an avenue for applications of anisotropic wetting surfaces, such as complex‐flow distribution and liquid delivery, and extend the design approach of multi‐bioinspiration integration. |
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| Keywords: | bioinspired materials liquid infused magnetocontrollable microcilia |
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