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Title: Unraveling the "pressure effect" in nucleation
Author: Wedekind, Jan
Hyvärinen, Antti-Pekka
Brus, David
Reguera, D. (David)
Keywords: Nucleació
Química física
Physical chemistry and chemical physics
Issue Date: 2008
Publisher: American Physical Society
Abstract: The influence of the pressure of a chemically inert carrier gas on the nucleation rate is one of the biggest puzzles in the research of gas-liquid nucleation. Experiments can show a positive effect, a negative effect, or no effect at all. The same experiment may show both trends for the same substance depending on temperature, or for different substances at the same temperature. We show how this ambiguous effect naturally arises from the competition of two contributions: nonisothermal effects and pressure-volume work. Our model clarifies seemingly contradictory experimental results and quantifies the variation of the nucleation ability of a substance in the presence of an ambient gas. Our findings are corroborated by molecular dynamics simulations and might have important implications since nucleation in experiments, technical applications, and nature practically always occurs in the presence of an ambient gas.
Note: Reproducció digital del document proporcionada per PROLA i
It is part of: Physical Review Letters, 2008, vol. 101, núm. 12, p. 125703-1-125703-4
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física de la Matèria Condensada)

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