DOI: 10.1002/2016GL070877
论文题名: An unexpected restructuring of combustion soot aggregates by subnanometer coatings of polycyclic aromatic hydrocarbons
作者: Chen C. ; Fan X. ; Shaltout T. ; Qiu C. ; Ma Y. ; Goldman A. ; Khalizov A.F.
刊名: Geophysical Research Letters
ISSN: 0094-8478
EISSN: 1944-8209
出版年: 2016
卷: 43, 期: 20 起始页码: 11080
结束页码: 11088
语种: 英语
英文关键词: aerosol
; aggregates
; morphology
; PAH
; soot
Scopus关键词: Aerosols
; Aggregates
; Anthracene
; Aromatic compounds
; Aromatic hydrocarbons
; Atmospheric aerosols
; Coatings
; Combustion
; Dust
; Hydrocarbons
; Light scattering
; Morphology
; Scanning electron microscopy
; Soot
; Atmospheric impact
; Combustion aerosols
; Diffusion burners
; Incomplete combustion
; Polycyclic aromatic hydrocarbon (PAH)
; Soot aggregates
; Sub nanometers
; Subcooled liquid state
; Polycyclic aromatic hydrocarbons
英文摘要: We investigated the effect of thin polycyclic aromatic hydrocarbon (PAH) coatings on the structure of soot aggregates. Soot aerosol from an inverted diffusion burner was size classified, thermally denuded, coated with six different PAHs, and then characterized using scanning electron microscopy, light scattering, and mass-mobility measurements. Contrary to our expectation, significant restructuring was observed in the presence of subnanometer layers of pyrene, fluoranthene, and phenanthrene. These PAHs remained in subcooled liquid state in thin films, whereby the liquid layer acted as a lubricant, reducing the force required to initiate the restructuring. Thin layers of PAH of higher melting temperatures (perylene, anthracene, and triphenylene) presumably remained solid because these chemicals induced lesser structural changes. Our results suggest that some of the intrinsic PAH generated during incomplete combustion may induce significant restructuring of soot aggregates, even when present in small quantities, altering the properties and atmospheric impacts of combustion aerosols. ©2016. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84995544878&doi=10.1002%2f2016GL070877&partnerID=40&md5=706c1164da1f065a762ed878dbb1e695
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9441
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: Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, United States
Recommended Citation:
Chen C.,Fan X.,Shaltout T.,et al. An unexpected restructuring of combustion soot aggregates by subnanometer coatings of polycyclic aromatic hydrocarbons[J]. Geophysical Research Letters,2016-01-01,43(20).