气候变化领域集成服务门户(CCPortal): Atmospheric Sulfuric Acid-Dimethylamine Nucleation Enhanced by Trifluoroacetic Acid

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DOI	10.1029/2019GL085627
	Atmospheric Sulfuric Acid-Dimethylamine Nucleation Enhanced by Trifluoroacetic Acid
	Lu Y.; Liu L.; Ning A.; Yang G.; Liu Y.; Kurtén T.; Vehkamäki H.; Zhang X.; Wang L.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:2
英文摘要	Sulfuric acid (SA)-dimethylamine (DMA)-H2O cluster formation has been proven to be responsible for a significant part of new particle formation (NPF) in a Chinese megacity. However, the possible involvement of common atmospheric acids in the subsequent growth of SA-DMA clusters remains elusive. We simulated formation and growth of clusters using atmospheric relevant concentrations of SA, DMA, and trifluoroacetic acid (TFA), a commonly observed atmospheric perfluorocarboxylic acid, using Density Functional Theory combined with Atmospheric Cluster Dynamics Code. The presence of TFA leads to complex cluster formation routes and an enhancement of NPF rates by up to 2.3 ([TFA] = 5.0 × 106 molecules cm−3, [SA] = 1.0 × 106 molecules cm−3, and [DMA] = 1.5 × 109 molecules cm−3). The agreement of (SA)1·(DMA)1-2·(TFA)1 concentrations between simulations and ambient measurements during NPF events validates model predictions and implies that perfluorocarboxylic acids could potentially boost atmospheric SA-DMA NPF rates. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Crystallization; Molecules; Nucleation; Sulfuric acid; Trifluoroacetic acid; Ambient measurement; cluster; Cluster dynamics; Cluster formations; Dimethylamines; Model prediction; New particle formation; Perfluorocarboxylic acid; Density functional theory; acetic acid; carboxylic acid; cluster analysis; concentration (composition); megacity; molecular analysis; nucleation; particle size; sulfuric acid; China
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/170829
作者单位	Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention (LAP3), Department of Environmental Science & Engineering, Jiangwan Campus, Fudan University, Shanghai, China; Key Laboratory of Cluster Science, Ministry of Education of China, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing, China; Department of Chemistry, University of Helsinki, Helsinki, Finland; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, Helsinki, Finland; Collaborative Innovation Center of Climate Change, Nanjing, China; Shanghai Institute of Pollution Control and Ecological Security, Shanghai, China
推荐引用方式 GB/T 7714	Lu Y.,Liu L.,Ning A.,et al. Atmospheric Sulfuric Acid-Dimethylamine Nucleation Enhanced by Trifluoroacetic Acid[J],2020,47(2).
APA	Lu Y..,Liu L..,Ning A..,Yang G..,Liu Y..,...&Wang L..(2020).Atmospheric Sulfuric Acid-Dimethylamine Nucleation Enhanced by Trifluoroacetic Acid.Geophysical Research Letters,47(2).
MLA	Lu Y.,et al."Atmospheric Sulfuric Acid-Dimethylamine Nucleation Enhanced by Trifluoroacetic Acid".Geophysical Research Letters 47.2(2020).