Article (Scientific journals)
Voltage-induced spreading and superspreading of liquids
Mchale, Glen; Brown, Carl; Sampara, Naresh
2013In Nature Communications, 4 (1605)
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Keywords :
Lenses; Wetting; Liquid lenses
Abstract :
[en] The ability to quickly spread a liquid across a surface and form a film is fundamental for a diverse range of technological processes, including printing, painting and spraying. Here we show that liquid dielectrophoresis or electrowetting can produce wetting on normally non-wetting surfaces, without needing modification of the surface topography or chemistry. Additionally, superspreading can be achieved without needing surfactants in the liquid. Here we use a modified Hoffman-de Gennes law to predict three distinct spreading regimes: exponential approach to an equilibrium shape, spreading to complete wetting obeying a Tanner's law-type relationship and superspreading towards a complete wetting film. We demonstrate quantitative experimental agreement with these predictions using dielectrophoresis-induced spreading of stripes of 1,2 propylene glycol. Our findings show how the rate of spreading of a partial wetting system can be controlled using uniform and non-uniform electric fields and how to induce more rapid superspreading using voltage control.
Disciplines :
Physics
Author, co-author :
Mchale, Glen
Other collaborator :
Language :
English
Title :
Voltage-induced spreading and superspreading of liquids
Publication date :
19 March 2013
Journal title :
Nature Communications
eISSN :
2041-1723
Publisher :
Nature Pub.lishing Group, London, United Kingdom
Volume :
4
Issue :
1605
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 23 June 2020

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