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Surface-active cis-pinonic acid in atmospheric droplets: A molecular dynamics study
Sch Biotechnol, Dept Theoret Chem, Royal Inst Technol, Stockholm, Sweden; China Univ Sci & Technol, Shanghai 200237, Peoples R China.
Dept Meteorol, Stockholm Univ, Stockholm, Sweden.
Örebro University, School of Science and Technology.
Dept Meteorol, Stockholm Univ, Stockholm, Sweden.
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2010 (English)In: The Journal of Physical Chemistry Letters, ISSN 1948-7185, Vol. 1, no 4, p. 769-773Article in journal (Refereed) Published
Abstract [en]

Water vapor in the atmosphere can condensate and form cloud droplets when there is a certain amount of humidity and a presence of cloud condensation nuclei, and organic solutes called surfactants can significantly lower the surface tension of water — one of the parameters determining cloud droplet population. We here present a molecular dynamics study of the behavior of cis-pinonic acid, a commonly found organic compound in cloud condensation nuclei, and its effect on the surface tension of water clusters. Specifically, the decrease in surface tension is found to depend on not only the concentration of the organic compound but also the droplet size due to the spontaneous assembly of the surfactant molecules on the droplet surface. This leads to the conclusion that the partitioning of the surfactant between the bulk and surface plays an important role in the behavior of atmospheric aerosol particles and thus in their availability for cloud formation.

Place, publisher, year, edition, pages
Washington, USA: American Chemical Society (ACS), 2010. Vol. 1, no 4, p. 769-773
National Category
Chemical Sciences
Research subject
Chemistry
Identifiers
URN: urn:nbn:se:oru:diva-12579DOI: 10.1021/jz9004784ISI: 000277040600018Scopus ID: 2-s2.0-77749264304OAI: oai:DiVA.org:oru-12579DiVA, id: diva2:372361
Available from: 2010-11-25 Created: 2010-11-25 Last updated: 2018-04-19Bibliographically approved

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Tu, Yaoquan

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