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ACP | Articles | Volume 19, issue 15
Atmos. Chem. Phys., 19, 10073–10085, 2019
https://doi.org/10.5194/acp-19-10073-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
Atmos. Chem. Phys., 19, 10073–10085, 2019
https://doi.org/10.5194/acp-19-10073-2019
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 09 Aug 2019

Research article | 09 Aug 2019

Predictions of diffusion rates of large organic molecules in secondary organic aerosols using the Stokes–Einstein and fractional Stokes–Einstein relations

Erin Evoy et al.

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Cited articles

Abramson, E., Imre, D., Beránek, J., Wilson, J., and Zelenyuk, A.: Experimental determination of chemical diffusion within secondary organic aerosol particles, Phys. Chem. Chem. Phys., 15, 2983–2991, https://doi.org/10.1039/c2cp44013j, 2013. 
Angell, C. A.: Formation of Glasses Fom Liquids and Biopolymers, Science 80, 267, 1924–1935, https://doi.org/10.1126/science.267.5206.1924, 1995. 
Bastelberger, S., Krieger, U. K., Luo, B., and Peter, T.: Diffusivity measurements of volatile organics in levitated viscous aerosol particles, Atmos. Chem. Phys., 17, 8453–8471, https://doi.org/10.5194/acp-17-8453-2017, 2017. 
Bodsworth, A., Zobrist, B., and Bertram, A. K.: Inhibition of efflorescence in mixed organic-inorganic particles at temperatures less than 250 K., Phys. Chem. Chem. Phys., 12, 12259–12266, https://doi.org/10.1039/c0cp00572j, 2010. 
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We measured the diffusion rates of organic molecules in a number of proxies for secondary organic aerosol (SOA) and compared measured diffusion with predictions from two relations: the Stokes–Einstein relation and a fractional Stokes–Einstein relation. The fractional relation does a better job of predicting diffusion rates in this case. Output from an atmospheric model shows that mixing times predicted using the two relations differ by up to 1 order of magnitude at an altitude of ~ 3 km.
We measured the diffusion rates of organic molecules in a number of proxies for secondary...
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