Nonequilibrium Gibbs’ Criterion for Completely Wetting Volatile Liquids
| Autor: | Yannis Tsoumpas, Uwe Thiele, Heidi Ottevaere, Sam Dehaeck, Mariano Galvagno, Alexey Rednikov, Pierre Colinet |
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| Přispěvatelé: | Applied Physics and Photonics, Brussels Photonics Team |
| Rok vydání: | 2014 |
| Předmět: |
Total internal reflection
Materials science Contact line Fluid Dynamics (physics.flu-dyn) Evaporation FOS: Physical sciences Non-equilibrium thermodynamics Thermodynamics CONTACT ANGLES EVAPORATING DROPLETS Physics - Fluid Dynamics Surfaces and Interfaces RESISTANCE SURFACES LINE Condensed Matter Physics Critical value Contact angle Electrochemistry General Materials Science Wetting Spectroscopy Line (formation) |
| Zdroj: | Vrije Universiteit Brussel |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/la502708f |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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