Articles | Volume 20, issue 19
https://doi.org/10.5194/acp-20-11263-2020
https://doi.org/10.5194/acp-20-11263-2020
Research article
 | 
02 Oct 2020
Research article |  | 02 Oct 2020

Liquid–liquid phase separation and morphologies in organic particles consisting of α-pinene and β-caryophyllene ozonolysis products and mixtures with commercially available organic compounds

Young-Chul Song, Ariana G. Bé, Scot T. Martin, Franz M. Geiger, Allan K. Bertram, Regan J. Thomson, and Mijung Song

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Cited articles

Anttila, T., Kiendler-Scharr, A., Tillmann, R., and Mentel, T. F.: On the reactive uptake of gaseous compounds by organic-coated aqueous aerosols: Theoretical analysis and application to the heterogeneous hydrolysis ofN2O5, J. Phys. Chem. A., 110, 10435–10443, https://doi.org/10.1021/Jp062403c, 2006. 
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Brunamonti, S., Krieger, U. K., Marcolli, C., and Peter, T.: Redistribution of black carbon in aerosol particles undergoing liquid-liquid phase separation, Geophys. Res. Lett., 42, 2532–2539, https://doi.org/10.1002/2014GL062908, 2015. 
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We report the liquid–liquid phase separation (LLPS) of organic aerosol consisting of α-pinene- and β-caryophyllene-derived ozonolysis products and commercial organic compounds. As compositional complexity increased from one to two organic species, LLPS occurred over a wider range of average O : C values (increasing from 0.44 to 0.67). These results provide further evidence that LLPS is likely frequent in organic aerosol particles in the troposphere, even in the absence of inorganic salt.
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