Skip to content
Journal article

Extinction efficiencies of coated absorbing aerosols measured by cavity ring down aerosol spectrometry

Riziq A, Trainic M, Erlick C, Segre E, Rudich Y ...see all

Atmospheric Chemistry and Physics Discussions, vol. 7, issue 6 (2007) pp. 18113-18144

  • 33

    Readers

    Mendeley users who have this article in their library.
  • Citations

    Citations of this article.
  • Views

    ScienceDirect users who have downloaded this article.
Sign in to save reference

Abstract

In this study, we measure the extinction efficiency at 532 nm of absorbing aerosol particles coated with a non-absorbing solid and liquid organic shell with coating thickness varying between 5 and 100 nm using cavity ring down aerosol spectrometry. For this purpose, we use nigrosin, an organic black dye, as a model absorbing core and two non-absorbing organic substances as shells, glutaric acid (GA) and Di-Ethyl-Hexyl-Sebacate (DEHS). The measured behavior of the coated particles is consistent with Mie calculations of core-shell particles. Errors between measured and calculated values for nigrosin coated with GA and DEHS are between 0.5% and 10.5% and between 0.5% and 9%, respectively. However, it is evident that the calculations are in better agreement with the measured results for thinner coatings. Possible reasons for these discrepancies are discussed.

Find this document

Get full text

Authors

Error loading document authors.

Cite this document

Choose a citation style from the tabs below