Issue 28, 2013
From the journal:

Physical Chemistry Chemical Physics

Evaporation kinetics of aqueous acetic acid droplets: effects of soluble organic aerosol components on the mechanism of water evaporation

Kaitlin C. Duffey,ab   Orion Shih,ab   Nolan L. Wong,a   Walter S. Drisdell,c   Richard J. Saykally*ab  and  Ronald C. Cohen*ad  

* Corresponding authors

a Department of Chemistry, University of California, Berkeley, CA 94720, USA
E-mail: saykally@berkeley.edu, rccohen@berkeley.edu

b Chemical Sciences Division, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USA

c Materials Science Division, Lawrence Berkeley National Laboratory, USA

d Department of Earth and Planetary Science, University of California, Berkeley, USA

Abstract

The presence of organic surfactants in atmospheric aerosol may lead to a depression of cloud droplet growth and evaporation rates affecting the radiative properties and lifetime of clouds. Both the magnitude and mechanism of this effect, however, remain poorly constrained. We have used Raman thermometry measurements of freely evaporating micro-droplets to determine evaporation coefficients for several concentrations of acetic acid, which is ubiquitous in atmospheric aerosol and has been shown to adsorb strongly to the air–water interface. We find no suppression of the evaporation kinetics over the concentration range studied (1–5 M). The evaporation coefficient determined for 2 M acetic acid is 0.53 ± 0.12, indistinguishable from that of pure water (0.62 ± 0.09).

Graphical abstract: Evaporation kinetics of aqueous acetic acid droplets: effects of soluble organic aerosol components on the mechanism of water evaporation

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Article information

DOI
https://doi.org/10.1039/C3CP51148K
Article type
Paper
Submitted
15 Mar 2013
Accepted
03 May 2013
First published
07 May 2013

Phys. Chem. Chem. Phys., 2013,15, 11634-11639

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Evaporation kinetics of aqueous acetic acid droplets: effects of soluble organic aerosol components on the mechanism of water evaporation

K. C. Duffey, O. Shih, N. L. Wong, W. S. Drisdell, R. J. Saykally and R. C. Cohen, Phys. Chem. Chem. Phys., 2013, 15, 11634 DOI: 10.1039/C3CP51148K

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