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.
机构:
Coll France, CNRS, URA 792, Phys Mat Condensee Lab, F-75231 Paris 05, FranceColl France, CNRS, URA 792, Phys Mat Condensee Lab, F-75231 Paris 05, France
Bico, J
;
Tordeux, C
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机构:
Coll France, CNRS, URA 792, Phys Mat Condensee Lab, F-75231 Paris 05, FranceColl France, CNRS, URA 792, Phys Mat Condensee Lab, F-75231 Paris 05, France
Tordeux, C
;
Quéré, D
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h-index: 0
机构:
Coll France, CNRS, URA 792, Phys Mat Condensee Lab, F-75231 Paris 05, FranceColl France, CNRS, URA 792, Phys Mat Condensee Lab, F-75231 Paris 05, France
机构:
Coll France, CNRS, URA 792, Phys Mat Condensee Lab, F-75231 Paris 05, FranceColl France, CNRS, URA 792, Phys Mat Condensee Lab, F-75231 Paris 05, France
Bico, J
;
Tordeux, C
论文数: 0引用数: 0
h-index: 0
机构:
Coll France, CNRS, URA 792, Phys Mat Condensee Lab, F-75231 Paris 05, FranceColl France, CNRS, URA 792, Phys Mat Condensee Lab, F-75231 Paris 05, France
Tordeux, C
;
Quéré, D
论文数: 0引用数: 0
h-index: 0
机构:
Coll France, CNRS, URA 792, Phys Mat Condensee Lab, F-75231 Paris 05, FranceColl France, CNRS, URA 792, Phys Mat Condensee Lab, F-75231 Paris 05, France