Electrical Switching of Wetting States on Superhydrophobic Surfaces: A Route Towards Reversible Cassie-to-Wenzel Transitions

被引：141

作者：

Manukyan, G. ^{[1
,2
]}

Oh, J. M. ^{[1
,2
]}

van den Ende, D. ^{[1
,2
]}

Lammertink, R. G. H. ^{[2
]}

Mugele, F. ^{[1
,2
]}

机构：

[1] Univ Twente, IMPACT, NL-7500 AE Enschede, Netherlands

[2] Univ Twente, Dept Sci & Technol, MESA Inst, NL-7500 AE Enschede, Netherlands

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 01期

关键词：

NANOSTRUCTURED SURFACES;

D O I：

10.1103/PhysRevLett.106.014501

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 state. We demonstrate how reversible switching between the two wetting states can be achieved locally using suitable surface and electrode geometries.

引用

页数：4

共 19 条

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