A fast-scanning DMA train for precision quantification of early nanoparticle growth

Paul M. Winkler, John Ortega, Thomas Karl, Peter H McMurry, James N. Smith

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Understanding the mechanisms of secondary organic aerosol formation is of critical importance for assessing aerosol radiative forcing and improving air quality control. A key quantity describing the gas-to-particle conversion is the rate at which nanoparticles of certain size are formed per unit volume and time. The quantification of nanoparticle formation rates requires precise knowledge of growth rates. Here we present a newly developed DMA train capable of providing definitive growth rates from size distribution scan frequencies of 1 Hz. This system has proven to yield statistically significant data even at ultra-low post-classification concentrations of 0.1 cm-3. A chamber study of α-pinene ozonolysis under close-to-ambient conditions demonstrates the need for particle size distribution measurements with increased time resolution.

Original languageEnglish (US)
Title of host publicationNucleation and Atmospheric Aerosols - 19th International Conference
Pages165-168
Number of pages4
DOIs
StatePublished - May 14 2013
Event19th International Conference on Nucleation and Atmospheric Aerosols, ICNAA 2013 - Fort Collins, CO, United States
Duration: Jun 23 2013Jun 28 2013

Publication series

NameAIP Conference Proceedings
Volume1527
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other19th International Conference on Nucleation and Atmospheric Aerosols, ICNAA 2013
CountryUnited States
CityFort Collins, CO
Period6/23/136/28/13

Keywords

  • DMA train
  • Secondary organic aerosol
  • growth rate
  • α-pinene

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