Size dependence of the structure of organic aerosol

Daniel P. Veghte, Muhammad Bilal Altaf, Miriam Arak Freedman

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

The effects of aerosol particles on heterogeneous atmospheric chemistry and climate are determined in part by the internal arrangement of compounds within the particles. We have used cryo-transmission electron microscopy to investigate the phase separation behavior of model organic aerosol composed of ammonium sulfate internally mixed with succinic or pimelic acid. We have found that no particle with a diameter <170 nm for succinic acid and 270 nm for pimelic acid is phase separated. Larger particles adopt a phase separated, partially engulfed structure. We therefore demonstrate that phase separation of aerosol particles is dependent on particle size and discuss implications for aerosol-climate interactions.

Original languageEnglish (US)
Pages (from-to)16046-16049
Number of pages4
JournalJournal of the American Chemical Society
Volume135
Issue number43
DOIs
StatePublished - Oct 30 2013

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Aerosols
Pimelic Acids
Succinic Acid
Climate
Phase separation
Particles (particulate matter)
Acids
Atmospheric chemistry
Cryoelectron Microscopy
Ammonium Sulfate
Transmission Electron Microscopy
Particle Size
Particle size
Transmission electron microscopy

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)
  • Biochemistry
  • Colloid and Surface Chemistry

Cite this

Veghte, Daniel P. ; Altaf, Muhammad Bilal ; Freedman, Miriam Arak. / Size dependence of the structure of organic aerosol. In: Journal of the American Chemical Society. 2013 ; Vol. 135, No. 43. pp. 16046-16049.
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Size dependence of the structure of organic aerosol. / Veghte, Daniel P.; Altaf, Muhammad Bilal; Freedman, Miriam Arak.

In: Journal of the American Chemical Society, Vol. 135, No. 43, 30.10.2013, p. 16046-16049.

Research output: Contribution to journalArticle

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