DOI: 10.1002/2014GL062908
论文题名: Redistribution of black carbon in aerosol particles undergoing liquid-liquid phase separation
作者: Brunamonti S. ; Krieger U.K. ; Marcolli C. ; Peter T.
刊名: Geophysical Research Letters
ISSN: 0094-8825
EISSN: 1944-8556
出版年: 2015
卷: 42, 期: 7 起始页码: 2532
结束页码: 2539
语种: 英语
英文关键词: black carbon
; light absorption in the atmosphere
; liquid-liquid phase separation
; morphology of mixed aerosols
Scopus关键词: Aerosols
; Atmospheric radiation
; Carbon
; Electromagnetic wave absorption
; Light absorption
; Morphology
; Phase separation
; Separation
; Shells (structures)
; Absorption efficiency
; Absorption enhancement
; Aerosol particles
; Black carbon
; Inverted core shells
; Liquid-liquid phase separation
; Organic/inorganic
; Radiative forcings
; Liquids
; absorption
; aerosol composition
; black carbon
; morphology
; phase equilibrium
英文摘要: Atmospheric black carbon (BC) is a major anthropogenic greenhouse agent, yet substantial uncertainties obstruct understanding its radiative forcing. Particularly debated is the extent of the absorption enhancement by internally compared to externally mixed BC, which critically depends on the interior morphology of the BC-containing particles. Here we suggest that a currently unaccounted morphology, optically very different from the customary core-shell and volume-mixing assumptions, likely occurs in aerosol particles undergoing liquid-liquid phase separation (LLPS). Using Raman spectroscopy on micrometer-sized droplets, we show that LLPS of an organic/inorganic model system drives redistribution of BC into the outer (organic) phase of the host particle. This results in an inverted core-shell structure, in which a transparent aqueous core is surrounded by a BC-containing absorbing shell. Based on Mie theory calculations, we estimate that such a redistribution can increase the absorption efficiency of internally mixed BC aerosols by up to 25% compared to the core-shell approximation. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84928698706&doi=10.1002%2f2014GL062908&partnerID=40&md5=5bb1820c0f0bcdce016086f08b433465
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8441
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: ETH Zürich, Institute for Atmospheric and Climate Science, Zürich, Switzerland
Recommended Citation:
Brunamonti S.,Krieger U.K.,Marcolli C.,et al. Redistribution of black carbon in aerosol particles undergoing liquid-liquid phase separation[J]. Geophysical Research Letters,2015-01-01,42(7).