When a droplet is put on a surface it spreads out, but how fast does it spread and how far can it spread?
Our experiments use a non-uniform electric field to create a force on the dipoles of a dielectric liquid.For droplets this forces them to set surfaces what we call “dielectrowetting”. This allows a voltage to be used to “dial up” the final state of a droplet. This can be a droplet, just sufficient to create a film or more than that needed to create a film. One does not need to wait for a film to form – the difference can be seen in how fast a droplet spreads.
Dielectrowetting driven spreading of droplets
G. McHale, C.V. Brown, M.I. Newton, G.G. Wells and N. Sampara
Physical Review Letters 107 (18) (2011) art. 186101.
Voltage induced superspreading
C.V. Brown, G. McHale and N. Sampara
Nature Communications 4 (2013) art. 1605.
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