毛细管作用
纤维
棘轮
利用
计算机科学
材料科学
机械工程
工程类
工作(物理)
复合材料
计算机安全
作者
Shan Zhou,F.F. Chen,Ziyang Cheng,Can Gao,Zengyi He,Shutao Wang,Lei Jiang,Haoyu Dai,Zhichao Dong
出处
期刊:Science Advances
[American Association for the Advancement of Science (AAAS)]
日期:2024-12-20
卷期号:10 (51)
标识
DOI:10.1126/sciadv.adr2135
摘要
Numerous organisms exploit asymmetrical capillary forces generated by unique fiber or asymmetrical tapered structures to rapidly eliminate undesired liquid for survival in moist or rainy habitats. Human eyelashes, the primary protector of eyes, use a yet-to-be-fully-understood mechanism to efficiently transfer incoming liquid for vision safeguarding. Here, we elucidate that human eyelashes featuring a hydrophobic curved flexible fiber array with surface micro-ratchet and macro-curvature approximating the Brachistochrone is adept at directionally and rapidly expelling incoming liquid to maintain clear vision. These structural attributes are sequentially used for liquid drainage, starting from anisotropic retention via micro-ratchet, followed by the elastic expulsion among deflected hydrophobic flexible fiber arrays and culminating in the fastest sliding off along a Brachistochrone path, which together reduce the contact time by about 20% of that on rigid linear slopes. Investigating the intricate relationship between multistructure and draining efficiency of human eyelashes may inspire the design of advanced liquid-repelling edges on outdoor devices to maintain dryness.
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