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

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Abstract

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
Original languageUndefined
Pages (from-to)1-4
Number of pages4
JournalPhysical review letters
Volume106
Issue number014501
DOIs
Publication statusPublished - 2011

Keywords

  • IR-79855
  • METIS-276553

Cite this

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title = "Electrical switching of wetting states on superhydrophobic surfaces: a route towards reversible Cassie-to-Wenzel transitions",
abstract = "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",
keywords = "IR-79855, METIS-276553",
author = "G. Manukyan and J.M. Oh and {van den Ende}, {Henricus T.M.} and Lammertink, {Rob G.H.} and Mugele, {Friedrich Gunther}",
year = "2011",
doi = "10.1103/PhysRevLett.106.014501",
language = "Undefined",
volume = "106",
pages = "1--4",
journal = "Physical review letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "014501",

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TY - JOUR

T1 - Electrical switching of wetting states on superhydrophobic surfaces: a route towards reversible Cassie-to-Wenzel transitions

AU - Manukyan, G.

AU - Oh, J.M.

AU - van den Ende, Henricus T.M.

AU - Lammertink, Rob G.H.

AU - Mugele, Friedrich Gunther

PY - 2011

Y1 - 2011

N2 - 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

AB - 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

KW - IR-79855

KW - METIS-276553

U2 - 10.1103/PhysRevLett.106.014501

DO - 10.1103/PhysRevLett.106.014501

M3 - Article

VL - 106

SP - 1

EP - 4

JO - Physical review letters

JF - Physical review letters

SN - 0031-9007

IS - 014501

ER -