Understanding hygroscopic growth and phase transformation of aerosols using single particle Raman spectroscopy in an electrodynamic balance

Faraday Discussions
Alex K Y LeeChak K Chan

Abstract

Hygroscopic growth is one of the most fundamental properties of atmospheric aerosols. By absorbing or evaporating water, an aerosol particle changes its size, morphology, phase, chemical composition and reactivity and other parameters such as its refractive index. These changes affect the fate and the environmental impacts of atmospheric aerosols, including global climate change. The ElectroDynamic Balance (EDB) has been widely accepted as a unique tool for measuring hygroscopic properties and for investigating phase transformation of aerosols via single particle levitation. Coupled with Raman spectroscopy, an EDB/Raman system is a powerful tool that can be used to investigate both physical and chemical changes associated with the hygroscopic properties of individually levitated particles under controlled environments. In this paper, we report the use of an EDB/Raman system to investigate (1) contact ion pairs formation in supersaturated magnesium sulfate solutions; (2) phase transformation in ammonium nitrate/ammonium sulfate mixed particles; (3) hygroscopicity of organically coated inorganic aerosols; and (4) heterogeneous reactions altering the hygroscopicity of organic aerosols.

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Citations

May 15, 2013·Environmental Science & Technology·Lap P Chan, Chak K Chan
May 25, 2013·The Annals of Occupational Hygiene·Anna Dahlman-HöglundEva Andersson
Sep 4, 2009·Physical Chemistry Chemical Physics : PCCP·L TreuelR Zellner
Jun 29, 2012·Chemical Society Reviews·Ulrich K KriegerJonathan P Reid
Dec 19, 2014·The Journal of Physical Chemistry. a·Olga LaskinaVicki H Grassian
Apr 25, 2012·The Journal of Physical Chemistry. a·Andreas PeckhausReinhard Zellner
Mar 23, 2017·Carbohydrate Polymers·Jelena D RusmirovićAleksandar D Marinković
Jun 18, 2017·The Journal of Physical Chemistry. a·Sarah Suda PettersSonia M Kreidenweis
Aug 21, 2018·Environmental Science. Processes & Impacts·Peter N TirellaAndrew P Ault
Nov 27, 2009·Environmental Science & Technology·Lap P ChanChak K Chan
Jun 20, 2018·The Journal of Physical Chemistry Letters·J M SchifferR E Amaro
Oct 2, 2021·Annals of Work Exposures and Health·Anna Dahlman-HöglundÅsa Lindgren

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