期刊
PHYSICAL REVIEW FLUIDS
卷 1, 期 7, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevFluids.1.073904
关键词
-
资金
- National Natural Science Foundation of China [21276007, 91434204]
Most superhydrophobic surfaces undergo a wetting transition from the Cassie to the Wenzel state, either spontaneously or under the action of external perturbations. The reverse dewetting transition is hampered by a large energy barrier and in order to achieve it, external fields are usually applied. Here we perform experiments, theoretical analysis, and lattice Boltzmann simulations of droplet condensation on a patterned superhydrophobic surface and demonstrate that the dewetting energy barrier can be reduced by manipulating the adhesion forces. Moreover, the kinetics of dewetting is a result of a subtle interplay of wetting and adhesion and in certain geometries, such as cone- shaped texture, the dewetting transition from Wenzel to Cassie state becomes spontaneous.
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