Surface-Active cis-Pinonic Acid in Atmospheric Droplets: A Molecular Dynamics Study
2010 (English)In: Journal of Physical Chemistry Letters, ISSN 1948-7185, Vol. 1, no 4, 769-773 p.Article in journal (Refereed) Published
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
2010. Vol. 1, no 4, 769-773 p.
Meteorology and Atmospheric Sciences
Research subject Meteorology; Atmospheric Sciences and Oceanography
IdentifiersURN: urn:nbn:se:su:diva-50130DOI: 10.1021/jz9004784ISI: 000277040600018OAI: oai:DiVA.org:su-50130DiVA: diva2:380590
authorCount :52010-12-212010-12-212012-12-17Bibliographically approved