Sticking coefficient and processing of water vapor on organic-coated nanoaerosols

The Journal of Physical Chemistry. a
Purnendu Chakraborty, Michael R Zachariah

Abstract

Organic-based aerosols may play an unexpectedly important role in the atmospheric processing of water vapor. In this paper, we report results of a molecular dynamics (MD) study on the sticking coefficient of water vapor on a coated particle (water droplet coated with fatty acid of radius approximately 4 nm). The sticking coefficient was found to be almost a constant (11-16%) for incident speeds around the most probable speed as opposed to 100% for water vapor incident on a pure water droplet. The sticking coefficient was found to increase with the size of the water cluster (water-Nmer) impinging the surface of the particle and was seen to approach 1 for impinging water clusters consisting of 10 molecules or more. We also computed the average energy transferred per collision for monomers impinging the surface of the coated particle and found the value to be 4.4581 kJ/mol. Most important perhaps was the fact that despite the lower sticking coefficient, the equilibrium vapor pressure of water over these inverted micelles was considerably lower due to the surface tension effects of the fatty acid layer. As such, these coated particles act as effective substrates for water vapor condensation and may play a role as cloud condensation...Continue Reading

References

Mar 31, 1999·Proceedings of the National Academy of Sciences of the United States of America·P R Buseck, M Pósfai
Aug 11, 2005·Physical Review Letters·Zhigang Li, Hai Wang
Feb 17, 2006·Physical Chemistry Chemical Physics : PCCP·Barbara E WyslouzilUta Dieregsweiler
Apr 25, 2006·Physical Chemistry Chemical Physics : PCCP·Jin-Song Li, Gerald Wilemski
Jun 2, 2007·The Journal of Physical Chemistry. a·Purnendu Chakraborty, Michael R Zachariah

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Citations

Apr 12, 2011·Physical Chemistry Chemical Physics : PCCP·Xiaofei MaMichael R Zachariah
Feb 12, 2015·The Journal of Chemical Physics·Harshad PathakBarbara E Wyslouzil
Jun 16, 2014·The Journal of Chemical Physics·Harshad PathakBarbara Wyslouzil
May 23, 2014·Nanomedicine : Nanotechnology, Biology, and Medicine·Yen-Hsun Tseng, Leonard F Pease
Apr 19, 2016·The Journal of Physical Chemistry. a·Gözde Ergin, Satoshi Takahama
May 25, 2013·Physical Chemistry Chemical Physics : PCCP·Maria DarvasPál Jedlovszky
May 15, 2009·PLoS Medicine·Kathryn ChuNathan Ford
Oct 31, 2014·Physical Chemistry Chemical Physics : PCCP·Lu SunHans Ågren
Mar 20, 2021·The Journal of Physical Chemistry. a·Matus E DivekyRuth Signorell
Mar 21, 2009·The Journal of Physical Chemistry. a·Ahmad AlshawaJoelle S Underwood
May 29, 2014·The Journal of Physical Chemistry. a·Christopher R Ruehl, Kevin R Wilson
Dec 3, 2014·The Journal of Physical Chemistry. B·A ObeidatG Wilemski
May 10, 2018·The Journal of Physical Chemistry. a·Xiangrui KongJan B C Pettersson

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