Electric field induced deformation of hemispherical sessile droplets of ionic liquid

Costas Tsakonas, Lindsey T. Corson, Ian C. Sage, Carl V. Brown

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Abstract

Sessile droplets of an ionic liquid with contact angles close to 90° were subjected to an electric field E = V/w inside a capacitor with plate separation w and potential difference V. For small field induced deformations of the droplet shape the change in maximum droplet height, Δh = h(E) – h(0), was found to be virtually independent of the plate separation provided that w > 3h(0). In this regime a scaling law obtains Δh α E2r2, where r is the constant droplet radius, in agreement with the asymptotic predictions of Basaran and Scriven (J. Coll. Int. Sci. 140, 10, 1990).
Original languageEnglish
Pages (from-to)437-440
Number of pages4
JournalJournal of Electrostatics
Volume72
Issue number6
Early online date3 Sep 2014
DOIs
Publication statusPublished - Dec 2014

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Keywords

  • wetting
  • contact angle
  • ionic liquid
  • electrostatic field
  • parallel plate capacitor

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