Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.5194/acp-18-1895-2018 |
Nanoparticle growth by particle-phase chemistry | |
Apsokardu, Michael J.; Johnston, Murray V. | |
2018-02-09 | |
发表期刊 | ATMOSPHERIC CHEMISTRY AND PHYSICS
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ISSN | 1680-7316 |
EISSN | 1680-7324 |
出版年 | 2018 |
卷号 | 18期号:3页码:1895-1907 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | The ability of particle-phase chemistry to alter the molecular composition and enhance the growth rate of nanoparticles in the 2-100 nm diameter range is investigated through the use of a kinetic growth model. The molecular components included are sulfuric acid, ammonia, water, a non-volatile organic compound, and a semi-volatile organic compound. Molecular composition and growth rate are compared for particles that grow by partitioning alone vs. those that grow by a combination of partitioning and an accretion reaction in the particle phase between two organic molecules. Particle-phase chemistry causes a change in molecular composition that is particle diameter dependent, and when the reaction involves semi-volatile molecules, the particles grow faster than by partitioning alone. These effects are most pronounced for particles larger than about 20 nm in diameter. The modeling results provide a fundamental basis for understanding recent experimental measurements of the molecular composition of secondary organic aerosol showing that accretion reaction product formation increases linearly with increasing aerosol volume-to-surface-area. They also allow initial estimates of the reaction rate constants for these systems. For secondary aerosol produced by either OH oxidation of the cyclic dimethylsiloxane (D-5) or ozonolysis of beta-pinene, oligomerization rate constants on the order of 10(-3) to 10(-1) M-1 s(-1) are needed to explain the experimental results. These values are consistent with previously measured rate constants for reactions of hydroperoxides and/or peroxyacids in the condensed phase. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000424791400001 |
WOS关键词 | SECONDARY ORGANIC AEROSOL ; KINETIC MULTILAYER MODEL ; VOLATILITY BASIS-SET ; OLIGOMER FORMATION ; REACTION-PRODUCTS ; REACTIVE UPTAKE ; NITRIC-ACID ; NUCLEATION ; SIZE ; EVAPORATION |
WOS类目 | Environmental Sciences ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/16139 |
专题 | 地球科学 |
作者单位 | Univ Delaware, Dept Chem & Biochem, Newark, DE 19716 USA |
推荐引用方式 GB/T 7714 | Apsokardu, Michael J.,Johnston, Murray V.. Nanoparticle growth by particle-phase chemistry[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2018,18(3):1895-1907. |
APA | Apsokardu, Michael J.,&Johnston, Murray V..(2018).Nanoparticle growth by particle-phase chemistry.ATMOSPHERIC CHEMISTRY AND PHYSICS,18(3),1895-1907. |
MLA | Apsokardu, Michael J.,et al."Nanoparticle growth by particle-phase chemistry".ATMOSPHERIC CHEMISTRY AND PHYSICS 18.3(2018):1895-1907. |
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