An innovative armour-strategy for robust superhydrophobic surfaces

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When contacting with lotus leaves,water droplets keep nearly spherical and can roll off easily.This is the famous self-cleaning phenomenon of superhydrophobic lotus leaves with micro-and nano-structures and low surface energy.Nowadays,on the basis of self-cleaning,the artificial superhydrophobic surfaces have been developed for various emerging applications,such as anti-icing,anti-fogging,anticorrosion,antibiofouling and drag reduction [1].However,these superhydrophobic surfaces are limited by their mechanical vulnerability in further practical applications [2] for the high local pressures suffered by the fragile micro-and nano-structures under abrasion.Although several strategies have attempted to improve robustness by introducing adhesion layers [3] or sacrificing upper structures [4],they hardly meet the demand of robustness in practice.
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