• Y. Tsoumpas
  • S. Dehaeck
  • M. Galvagno
  • A. Rednikov
  • Heidi Ottevaere
  • U. Thiele
  • P. Colinet
During the spreading of a liquid over a solid substrate, the contact line can stay pinned at sharp edges until the contact angle exceeds a critical value. At (or sufficiently near) equilibrium, this is known as Gibbs' criterion. Here, we show both experimentally and theoretically that, for completely wetting volatile liquids, there also exists a dynamically-produced contribution to the critical angle for depinning, which increases with the evaporation rate. This suggests that one may introduce a simple modification of the Gibbs' criterion for (de)pinning that accounts for the nonequilibrium effect of evaporation.
Original languageEnglish
Pages (from-to)11847-11852
Number of pages6
JournalLangmuir
Volume30
Issue number40
Publication statusPublished - 14 Oct 2014

    Research areas

  • CONTACT ANGLES; EVAPORATING DROPLETS;, RESISTANCE; SURFACES; LINE

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