气候变化领域集成服务门户(CCPortal): 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

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DOI	10.5194/acp-20-11263-2020
	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
	Song Y.-C.; Bé A.G.; Martin S.T.; Geiger F.M.; Bertram A.K.; Thomson R.J.; Song M.
发表日期	2020
ISSN	16807316
起始页码	11263
结束页码	11273
卷号	20 期号:19
英文摘要	Liquid-liquid phase separation (LLPS) in organic aerosol particles can impact several properties of atmospheric particulate matter, such as cloud condensation nuclei (CCN) properties, optical properties, and gas-to-particle partitioning. Yet, our understanding of LLPS in organic aerosols is far from complete. Here, we report on the LLPS of onecomponent and two-component organic particles consisting of a-pinene-and β-caryophyllene-derived ozonolysis products and commercially available organic compounds of relevance to atmospheric organic particles. In the experiments involving single-component organic particles, LLPS was observed in 8 out of 11 particle types studied. LLPS almost always occurred when the oxygen-to-carbon elemental ratio (O V C) was < 0.44 but did not occur when O V C was > 0.44. The phase separation occurred by spinodal decomposition as well as the nucleation and growth mechanism, and when LLPS occurred, two liquid phases coexisted up to ∼ 100 % relative humidity (RH). In the experiments involving two-component organic particles, LLPS was observed in 23 out of 25 particles types studied. LLPS almost always occurred when the average was O V C = 0.67 but never occurred when the average O V C was > 0.67. The phase separation occurred by spinodal decomposition as well as the nucleation and growth mechanism. When LLPS occurred, two liquid phases coexisted up to ∼ 100 % RH. These results provide further evidence that LLPS is likely a frequent occurrence in organic aerosol particles in the troposphere, even in the absence of inorganic salts. © 2020 Author(s).
语种	英语
scopus关键词	aerosol; aerosol composition; atmospheric particle; cloud condensation nucleus; organic matter; ozonation; partitioning; separation; troposphere
来源期刊	Atmospheric Chemistry and Physics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/143922
作者单位	Department of Earth and Environmental Sciences, Jeonbuk National University, Jeollabuk-do, South Korea; Department of Chemistry, Northwestern University, Evanston, IL 60208, United States; School of Engineering and Applied Sciences, Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, United States; Department of Chemistry, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
推荐引用方式 GB/T 7714	Song Y.-C.,Bé A.G.,Martin S.T.,et al. 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[J],2020,20(19).
APA	Song Y.-C..,Bé A.G..,Martin S.T..,Geiger F.M..,Bertram A.K..,...&Song M..(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.Atmospheric Chemistry and Physics,20(19).
MLA	Song Y.-C.,et al."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".Atmospheric Chemistry and Physics 20.19(2020).