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Title: 3D bioinspired microstructures for switchable repellency in both air and liquid
Authors: Liu, Xiaojiang
Gu, Hongcheng
Ding, Haibo
Du, Xin
Wei, Mengxiao
Chen, Qiang
Gu, Zhongze
Keywords: Engineering::Mechanical engineering
Issue Date: 2020
Source: Liu, X., Gu, H., Ding, H., Du, X., Wei, M., Chen, Q. & Gu, Z. (2020). 3D bioinspired microstructures for switchable repellency in both air and liquid. Advanced Science, 7(20), 2000878-.
Journal: Advanced Science
Abstract: In addition to superhydrophobicity/superoleophobicity, surfaces with switchable water/oil repellency have also aroused considerable attention because of their potential values in microreactors, sensors, and microfluidics. Nevertheless, almost all those as-prepared surfaces are only applicable for liquids with higher surface tension (γ > 25.0 mN m-1) in air. In this work, inspired by some natural models, such as lotus leaf, springtail skin, and filefish skin, switchable repellency for liquids (γ = 12.0-72.8 mN m-1) in both air and liquid is realized via employing 3D deformable multiply re-entrant microstructures. Herein, the microstructures are fabricated by a two-photon polymerization based 3D printing technique and the reversible deformation is elaborately tuned by evaporation-induced bending and immersion-induced fast recovery (within 30 s). Based on 3D controlled microstructural architectures, this work offers an insightful explanation of repellency/penetration behavior at any three-phase interface and starts some novel ideas for manipulating opposite repellency by designing/fabricating stimuli-responsive microstructures.
ISSN: 2198-3844
DOI: 10.1002/advs.202000878
Rights: © 2020 The Authors. Published by Wiley-VCH GmbH. This is an openaccess article under the terms of the Creative Commons AttributionLicense, which permits use, distribution and reproduction in anymedium, provided the original work is properly cited
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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