Electrical switching of wetting states on superhydrophobic surfaces: a route towards reversible Cassie-to-Wenzel transitions.

@article{Manukyan2011ElectricalSO,
  title={Electrical switching of wetting states on superhydrophobic surfaces: a route towards reversible Cassie-to-Wenzel transitions.},
  author={Gor Manukyan and Jung Min Oh and Dirk van den Ende and Rob G H Lammertink and Frieder Mugele},
  journal={Physical review letters},
  year={2011},
  volume={106 1},
  pages={014501}
}
We demonstrate that the equilibrium shape of the composite interface between superhydrophobic surfaces and drops in the superhydrophobic Cassie state under electrowetting is determined by the balance of the Maxwell stress and the Laplace pressure. Energy barriers due to pinning of contact lines at the edges of the hydrophobic pillars control the transition from the Cassie to the Wenzel state. Barriers due to the narrow gap between adjacent pillars control the lateral propagation of the Wenzel… CONTINUE READING
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