2007
DOI: 10.1021/jp065348g
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On the Derivation of Young's Equation for Sessile Drops:  Nonequilibrium Effects Due to Evaporation

Abstract: Sessile liquid drops have a higher vapor pressure than planar liquid surfaces, as quantified by Kelvin's equation. In classical derivations of Young's equation, this fact is often not taken into account. For an open system, a sessile liquid drop is never in thermodynamic equilibrium and will eventually evaporate. Practically, for macroscopic drops the time of evaporation is so long that nonequilibrium effects are negligible. For microscopic drops evaporation cannot be neglected. When a liquid is confined to a … Show more

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Cited by 82 publications
(69 citation statements)
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“…Such extremely small volumes of conventional liquids should evaporate in a few seconds under ambient conditions. When water is used as the suspending liquid, no liquid substances are seen, which is consistent with the evaporative behavior of water (for example, a "large" water microdroplet with a volume of 10 m 3 evaporates in 10 s in a 99% RH atmosphere) (1). Salts are known to have little effect on the evaporation of water, but a stabilization as strong and long lasting as that observed in this work cannot be explained based only on a solute effect.…”
Section: Replacement Of Bacteria With Nonbiological (Alsupporting
confidence: 64%
“…Such extremely small volumes of conventional liquids should evaporate in a few seconds under ambient conditions. When water is used as the suspending liquid, no liquid substances are seen, which is consistent with the evaporative behavior of water (for example, a "large" water microdroplet with a volume of 10 m 3 evaporates in 10 s in a 99% RH atmosphere) (1). Salts are known to have little effect on the evaporation of water, but a stabilization as strong and long lasting as that observed in this work cannot be explained based only on a solute effect.…”
Section: Replacement Of Bacteria With Nonbiological (Alsupporting
confidence: 64%
“…Droplets on the nanometer scale show a reduction in evaporation as their volume decreases when compared with a millimetre sized droplet (macroscale) of the same liquid. This has already been shown for water (Butt et al, 2007). Because of the low height of the droplets, interactions between the surface and liquid molecules are more likely (attractive forces) and thus evaporation is hindered.…”
Section: Droplet Geometry and Evaporation Dynamicssupporting
confidence: 58%
“…The presence of such a film in the immediate vicinity of the triple contact line would explain hysteresis, if it does not result from the roughness and heterogeneity of the surface. The film may form due too the liquid evaporation from the drop surface, where the vapor pressure is higher than above a planar surface, what results from Kelvin's equation [16,17], as well as due to the receded triple contact line, where disjoining pressure of the film plays an important role [18].…”
Section: Resultsmentioning
confidence: 99%