材料科学
垂直的
支柱
聚二甲基硅氧烷
胶粘剂
树蛙
GSM演进的增强数据速率
复合材料
弯曲
刚度
六方晶系
剪切(地质)
几何学
结晶学
结构工程
生物
计算机科学
生态学
电信
化学
数学
图层(电子)
工程类
作者
Jagoba Iturri,Longjian Xue,Michael Kappl,Luis García‐Fernández,W. Jon. P. Barnes,Hans‐Jürgen Butt,Aránzazu del Campo
标识
DOI:10.1002/adfm.201403751
摘要
Anatomic differences on the toe pad epithelial cells of torrent and tree frogs (elongated versus regular geometry) are believed to account for superior ability of torrent frogs to attach to surfaces in the presence of running water. Here, the friction properties of artificial hexagonal arrays of polydimethylsiloxane (PDMS) pillars (elongated and regular) in the presence of water are compared. Elongated pillar patterns show significantly higher friction in a direction perpendicular to the long axis. A low bending stiffness of the pillars and a high edge density of the pattern in the sliding direction are the key design criteria for the enhanced friction. The elongated patterns also favor orientation‐dependent friction. These findings have important implications for the development of new reversible adhesives for wet conditions.
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