Topography driven spreading

被引:216
作者
McHale, G [1 ]
Shirtcliffe, NJ [1 ]
Aqil, S [1 ]
Perry, CC [1 ]
Newton, MI [1 ]
机构
[1] Nottingham Trent Univ, Sch Biomed & Nat Sci, Nottingham NG11 8NS, England
基金
英国工程与自然科学研究理事会;
关键词
D O I
10.1103/PhysRevLett.93.036102
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Roughening a hydrophobic surface enhances its nonwetting properties into superhydrophobicity. For liquids other than water, roughness can induce a complete rollup of a droplet. However, topographic effects can also enhance partial wetting by a given liquid into complete wetting to create superwetting. In this work, a model system of spreading droplets of a nonvolatile liquid on surfaces having lithographically produced pillars is used to show that superwetting also modifies the dynamics of spreading. The edge speed-dynamic contact angle relation is shown to obey a simple power law, and such power laws are shown to apply to naturally occurring surfaces.
引用
收藏
页码:036102 / 1
页数:4
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