Articles | Volume 21, issue 2
https://doi.org/10.5194/acp-21-1325-2021
https://doi.org/10.5194/acp-21-1325-2021
Research article
 | 
01 Feb 2021
Research article |  | 01 Feb 2021

Ozonolysis of fatty acid monolayers at the air–water interface: organic films may persist at the surface of atmospheric aerosols

Benjamin Woden, Maximilian W. A. Skoda, Adam Milsom, Curtis Gubb, Armando Maestro, James Tellam, and Christian Pfrang

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Subject: Aerosols | Research Activity: Laboratory Studies | Altitude Range: Troposphere | Science Focus: Chemistry (chemical composition and reactions)
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Cited articles

Allan, J. D., Williams, P. I., Morgan, W. T., Martin, C. L., Flynn, M. J., Lee, J., Nemitz, E., Phillips, G. J., Gallagher, M. W., and Coe, H.: Contributions from transport, solid fuel burning and cooking to primary organic aerosols in two UK cities, Atmos. Chem. Phys., 10, 647–668, https://doi.org/10.5194/acp-10-647-2010, 2010. 
Ambaum, M. H. P.: Thermal Physics of the Atmosphere, 1st edn., Wiley-Blackwell, Reading, UK, 2010. 
Barnes, G. T.: Permeation through monolayers, Colloid. Surface. A, 126, 149–158, https://doi.org/10.1016/S0927-7757(96)03926-X, 1997. 
Benjamin, I.: Chemical Reactions and Solvation at Liquid Interfaces: A Microscopic Perspective Chemical Reactions and Solvation at Liquid Interfaces: A Microscopic Perspective, Chem. Rev., 96, 1449–1476, https://doi.org/10.1021/cr950230, 1996. 
Cantrell, W. and Robinson, C.: Heterogeneous freezing of ammonium sulfate and sodium chloride solutions by long chain alcohols, Geophys. Res. Lett., 33, L07802, https://doi.org/10.1029/2005gl024945, 2006. 
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Short summary
Atmospheric aerosols contain a large amount of organic compounds, whose oxidation affects their physical properties through a process known as ageing. We have simulated atmospheric ageing experimentally to elucidate the nature and behaviour of residual surface films. Our results show an increasing amount of residue at near-zero temperatures, demonstrating that an inert product film may build up during droplet ageing, even if only ordinarily short-lived reactive species are initially emitted.
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