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| Titel |
Glycine in aerosol water droplets: a critical assessment of Köhler theory by predicting surface tension from molecular dynamics simulations |
| VerfasserIn |
X. Li, T. Hede, Y. Tu, C. Leck, H. Ågren |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 11, no. 2 ; Nr. 11, no. 2 (2011-01-18), S.519-527 |
| Datensatznummer |
250009181
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| Publikation (Nr.) |
 copernicus.org/acp-11-519-2011.pdf |
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| Zusammenfassung |
| Aerosol particles in the atmosphere are important participants in the
formation of cloud droplets and have significant impact on cloud albedo and
global climate. According to the Köhler theory which describes the
nucleation and the equilibrium growth of cloud droplets, the surface tension
of an aerosol droplet is one of the most important factors that determine
the critical supersaturation of droplet activation. In this paper, with
specific interest to remote marine aerosol, we predict the surface tension
of aerosol droplets by performing molecular dynamics simulations on two
model systems, the pure water droplets and glycine in water droplets. The
curvature dependence of the surface tension is interpolated by a quadratic
polynomial over the nano-sized droplets and the limiting case of a planar
interface, so that the so-called Aitken mode particles which are critical
for droplet formation could be covered and the Köhler equation could be
improved by incorporating surface tension corrections. |
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