2015
DOI: 10.5194/acp-15-5027-2015
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Influence of particle-phase state on the hygroscopic behavior of mixed organic–inorganic aerosols

Abstract: Abstract. Recent work has demonstrated that organic and mixed organic-inorganic particles can exhibit multiple phase states depending on their chemical composition and on ambient conditions such as relative humidity (RH). To explore the extent to which water uptake varies with particlephase behavior, hygroscopic growth factors (HGFs) of nine laboratory-generated, organic and organic-inorganic aerosol systems with physical states ranging from well-mixed liquids to phase-separated particles to viscous liquids or… Show more

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Cited by 96 publications
(113 citation statements)
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References 88 publications
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“…The CPOT has been constructed as a complement to the Caltech 24 m 3 batch chambers (Bates et al, , 2016Schilling et al, 2015;Hodas et al, 2015;Loza et al, 2013Loza et al, , 2014McVay et al, 2014McVay et al, , 2016Nguyen et al, 2014Nguyen et al, , 2015Schwantes et al, 2015;Yee et al, 2013;Zhang et al, 2014; in carrying out studies of SOA formation resulting from the oxidation of volatile organic compounds (VOCs) by oxidants OH, O 3 and NO 3 over timescales not accessible in a batch chamber. Due to its steady-state operation, the CPOT also affords the capability to collect sufficient quantities of SOA generated in the reactor for comprehensive composition determination by offline mass spectrometry.…”
Section: Y Huang Et Al: the Caltech Photooxidation Flow Tube Reactormentioning
confidence: 99%
“…The CPOT has been constructed as a complement to the Caltech 24 m 3 batch chambers (Bates et al, , 2016Schilling et al, 2015;Hodas et al, 2015;Loza et al, 2013Loza et al, , 2014McVay et al, 2014McVay et al, , 2016Nguyen et al, 2014Nguyen et al, , 2015Schwantes et al, 2015;Yee et al, 2013;Zhang et al, 2014; in carrying out studies of SOA formation resulting from the oxidation of volatile organic compounds (VOCs) by oxidants OH, O 3 and NO 3 over timescales not accessible in a batch chamber. Due to its steady-state operation, the CPOT also affords the capability to collect sufficient quantities of SOA generated in the reactor for comprehensive composition determination by offline mass spectrometry.…”
Section: Y Huang Et Al: the Caltech Photooxidation Flow Tube Reactormentioning
confidence: 99%
“…Studies have shown that water-soluble organic matter from biomass burning (approximately 70 % of total organic matter) can significantly suppress, enhance, or have no effect on the deliquescence (e.g., the RH at which deliquescence occurs at a certain temperature, the DRH) and efflorescence processes (e.g., the efflorescence RH, ERH) of present inorganic electrolytes. The effect depends predominantly on the type of organics, mass fraction of organics relative to inorganics, and particle size (Zawadowicz et al, 2015;Hodas et al, 2015;Gupta et al, 2015). Whole particles, individual phases within particles, or specific chemical compounds can undergo a range of phase transitions including crystallization-efflorescence, dissolution-deliquescence, and liquid-liquid phase separation as the RH varies in the atmosphere.…”
Section: Introductionmentioning
confidence: 99%
“…For example, equilibrium between the variable environmental water vapor mixing ratio and aerosol particles may lead to substantial changes in particle size and chemical composition, all of which can influence light absorption and scattering (Seinfeld and Pandis, 2006;Zhang et al, 2016). Transitions between solid and liquid (aqueous) phases that are dependent on relative humidity (RH) are also important in determining optical properties (Martin et al, 2013;Wang et al, 2010;Kim et al, 2016;Wu et al, Denjean et al, 2015Hodas et al, 2015;Atkinson et al, 2015). Studies have shown that water-soluble organic matter from biomass burning (approximately 70 % of total organic matter) can significantly suppress, enhance, or have no effect on the deliquescence (e.g., the RH at which deliquescence occurs at a certain temperature, the DRH) and efflorescence processes (e.g., the efflorescence RH, ERH) of present inorganic electrolytes.…”
Section: Introductionmentioning
confidence: 99%
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“…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: 91%