Oxidation Enhances Aerosol Nucleation: Measurement of Kinetic Pickup Probability of Organic Molecules on Hydrated Acid ClustersClick to copy article linkArticle link copied!
- Jozef Lengyel*Jozef Lengyel*E-mail: [email protected]Chair of Physical Chemistry, Department of Chemistry, Technical University of Munich, Lichtenbergstraße 4, 85748 Garching, GermanyMore by Jozef Lengyel
- Andriy PysanenkoAndriy PysanenkoJ. Heyrovský Institute of Physical Chemistry, v.v.i., Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Prague, Czech RepublicMore by Andriy Pysanenko
- Karolína FárníkováKarolína FárníkováJ. Heyrovský Institute of Physical Chemistry, v.v.i., Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Prague, Czech RepublicMore by Karolína Fárníková
- Eva Pluhařová*Eva Pluhařová*E-mail: [email protected]J. Heyrovský Institute of Physical Chemistry, v.v.i., Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Prague, Czech RepublicMore by Eva Pluhařová
- Michal Fárník*Michal Fárník*E-mail: [email protected]J. Heyrovský Institute of Physical Chemistry, v.v.i., Czech Academy of Sciences, Dolejškova 2155/3, 182 23 Prague, Czech RepublicMore by Michal Fárník
Abstract
We investigate the uptake of the most prominent biogenic volatile organic compounds (VOCs)—isoprene, α-pinene, and their selected oxidation products—by hydrated acid clusters in a molecular beam experiment and by DFT calculations. Our experiments provide a unique and direct way of determination of the surface accommodation coefficient (αS) on the proxies of ultrafine aerosol particles. Since we are able to determine unambiguously the fraction of the clusters to which the molecules stick upon collisions, our αS is a purely kinetic parameter disentangling the molecule pickup from its evaporation. Oxidation increases the αS of VOCs by more than an order of magnitude, because oxidized compounds form hydrogen bonds with the clusters, whereas the interactions of the parent VOCs are weaker and nonspecific. This work provides molecular-level insight into the condensation of single molecules into atmospheric particles, which has important implications for aerosol nucleation and growth.
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This article is cited by 11 publications.
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