Liquid-liquid phase separation in aerosol particles: Dependence on O:C, organic functionalities, and compositional complexity

Atmospheric aerosol particles may undergo liquid‐liquid phase separation (LLPS) when exposed to varying relative humidity. In this study we investigated the occurrence of LLPS for mixtures consisting of up to ten organic compounds, ammonium sulfate, and water in relationship with the organic oxygen‐...

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Bibliographic Details
Published in:Geophysical research letters 2012-10, Vol.39 (19), p.n/a
Main Authors: Song, M., Marcolli, C., Krieger, U. K., Zuend, A., Peter, T.
Format: Article
Language:English
Subjects:
Aerosols
Ammonium
Aromatic compounds
Atmospheric aerosols
Atmospheric sciences
Earth sciences
Earth, ocean, space
Exact sciences and technology
liquid-liquid phase separation
Organic compounds
Relative humidity
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Summary:Atmospheric aerosol particles may undergo liquid‐liquid phase separation (LLPS) when exposed to varying relative humidity. In this study we investigated the occurrence of LLPS for mixtures consisting of up to ten organic compounds, ammonium sulfate, and water in relationship with the organic oxygen‐to‐carbon (O:C) ratio. LLPS always occurred for O:C  0.80, and depended on the specific types and compositions of organic functional groups in the regime 0.56 
ISSN:0094-8276
1944-8007
DOI:10.1029/2012GL052807