2006
DOI: 10.1021/jp0556759
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Phase Changes during Hygroscopic Cycles of Mixed Organic/Inorganic Model Systems of Tropospheric Aerosols

Abstract: A correct description of the aerosol's phases is required to determine its gas/particle partitioning, its reactivity and its water uptake and release. In this study, we investigate organic/electrolyte interactions of ammonium sulfate, nitrate and sodium chloride with substances containing carboxylic acids (COOH) and hydroxyl (OH) functional groups. As organic model compounds, we chose polyols with different OH/CHn (n = 0-3) ratios-namely, glycerol, 1,4-butanediol, and 1,2-hexanediol-as well as PEG 400 and a mi… Show more

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Cited by 183 publications
(273 citation statements)
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“…For a partial engulfed configuration, the spreading coefficient of the organic-rich phase on the aqueous phase needs to be smaller than zero, which implies an interfacial tension (Marcolli and Krieger, 2006;Zuend et al, 2008;Ciobanu et al, 2009;Bertram et al, 2011, see Table 2 for the datasets) and this study (orange symbols). The blue and red arrows correspond to the addition of hydroxyl and carboxylic acid (or hydroxyl + ketone/aldehyde) functional groups to an alkane backbone, respectively, as discussed in Heald et al (2010).…”
Section: Possible Morphologies Of Droplets On a Hydrophobically Coatementioning
confidence: 76%
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“…For a partial engulfed configuration, the spreading coefficient of the organic-rich phase on the aqueous phase needs to be smaller than zero, which implies an interfacial tension (Marcolli and Krieger, 2006;Zuend et al, 2008;Ciobanu et al, 2009;Bertram et al, 2011, see Table 2 for the datasets) and this study (orange symbols). The blue and red arrows correspond to the addition of hydroxyl and carboxylic acid (or hydroxyl + ketone/aldehyde) functional groups to an alkane backbone, respectively, as discussed in Heald et al (2010).…”
Section: Possible Morphologies Of Droplets On a Hydrophobically Coatementioning
confidence: 76%
“…Interactions between organic and inorganic components within an aerosol particle can influence DRH and ERH of inorganic salts or even totally suppress crystallization (Marcolli et al, 2004;Parsons et al, 2006). Furthermore, liquid-liquid phase separation (LLPS) into a mainly polar inorganic and a less polar organicrich phase during humidity cycles may occur (Marcolli and Krieger, 2006). To date direct experimental evidence of the physical state and morphology of submicron aerosols is scarce.…”
Section: Song Et Al: Liquid-liquid Phase Separation and Morphologymentioning
confidence: 99%
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“…It is important to consider that in the case of multicomponent inorganic-organic particles it is possible that a liquid-liquid phase separation may occur (Marcolli and Krieger, 2006;Ciobanu et al, 2009;Bertram et al, 2011;Song et al, 2012;Zuend and Seinfeld, 2012). Since we cannot distinguish phase separation in the 100 nm particles studied here, we discuss below whether the observed bounce behavior is consistent with one or both of the two possible cases, i.e.…”
Section: Phase State and Humidity-induced Phase Transitions Of Mixed mentioning
confidence: 99%
“…For example, various "bulk" sample analyses conducted in the laboratory have confirmed the liquid-liquid phase separation do exist for the secondary particles [41,46,47]. The presence of the organic core and inorganic shell in individual particles have been confirmed in the laboratory by using optical microscopy and Raman spectroscopy [38,41,42], atomic force microscopy with infrared spectroscopy [48], and environmental scanning electron microscopy and scanning transmission X-ray microscopy [49].…”
Section: Possible Phase Transformation Of Cs Particlesmentioning
confidence: 93%