Comment on "Unraveling the 'Pressure Effect' in Nucleation"
Vincent Holten, J. Hrub\'y, M. E. H. van Dongen, and D. M. J., Smeulders
TL;DR
This paper critiques a 2008 study on nucleation, clarifying that the pressure-volume work term reflects the carrier gas's effect on phase equilibrium, especially relevant at high pressures.
Contribution
It clarifies the physical interpretation of the pressure-volume work term in nucleation theory, emphasizing its relation to phase equilibrium and high-pressure conditions.
Findings
Pressure-volume work relates to phase equilibrium effects.
The term does not appear with proper supersaturation definitions at high pressure.
Reinterpretation impacts nucleation modeling under high-pressure conditions.
Abstract
In a 2008 Letter, Wedekind et al. discussed the influence of an inert carrier gas on the vapor-liquid nucleation rate. They found an additional "pressure-volume work" that is performed against the carrier gas, and also quantified the nonisothermal effects arising from the carrier gas. We argue that the pressure-volume work term represents the influence of the carrier gas on phase equilibrium itself. This term will not appear explicitly when a definition of the supersaturation is used that is appropriate for high-pressure nucleation.
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Taxonomy
Topicsnanoparticles nucleation surface interactions · Crystallization and Solubility Studies · Solidification and crystal growth phenomena