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Solvent and cosolute dependence of Mg surface enrichment in submicron aerosol particles

The formation of multicomponent aerosol particles from precursor solution droplets often involves segregation and surface enrichment of the different solutes, resulting in non-homogeneous particle structures and diverse morphologies. In particular, these effects can have a significant influence on t...

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Autores principales: Pelimanni, Eetu, Saak, Clara-Magdalena, Michailoudi, Georgia, Prisle, Nønne, Huttula, Marko, Patanen, Minna
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8809137/
https://www.ncbi.nlm.nih.gov/pubmed/35060587
http://dx.doi.org/10.1039/d1cp04953d
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author Pelimanni, Eetu
Saak, Clara-Magdalena
Michailoudi, Georgia
Prisle, Nønne
Huttula, Marko
Patanen, Minna
author_facet Pelimanni, Eetu
Saak, Clara-Magdalena
Michailoudi, Georgia
Prisle, Nønne
Huttula, Marko
Patanen, Minna
author_sort Pelimanni, Eetu
collection PubMed
description The formation of multicomponent aerosol particles from precursor solution droplets often involves segregation and surface enrichment of the different solutes, resulting in non-homogeneous particle structures and diverse morphologies. In particular, these effects can have a significant influence on the chemical composition of the particle–vapor interface. In this work, we investigate the bulk/surface partitioning of inorganic ions, Na(+), Mg(2 +), Ca(2 +), Cl(−) and Br(−), in atomiser-generated submicron aerosols using synchrotron radiation based X-ray photoelectron spectroscopy (XPS). Specifically, the chemical compositions of the outermost few nm thick surface layers of non-supported MgCl(2)/CaCl(2) and NaBr/MgBr(2) particles are determined. It is found that in MgCl(2)/CaCl(2) particles, the relative abundance of the two species in the particle surface correlates well with their mixing ratio in the parent aqueous solution. In stark contrast, extreme surface enrichment of Mg(2 +) is observed in NaBr/MgBr(2) particles formed from both aqueous and organic solution droplets, indicative of core–shell structures. Structural properties and hydration state of the particles are discussed.
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spelling pubmed-88091372022-02-24 Solvent and cosolute dependence of Mg surface enrichment in submicron aerosol particles Pelimanni, Eetu Saak, Clara-Magdalena Michailoudi, Georgia Prisle, Nønne Huttula, Marko Patanen, Minna Phys Chem Chem Phys Chemistry The formation of multicomponent aerosol particles from precursor solution droplets often involves segregation and surface enrichment of the different solutes, resulting in non-homogeneous particle structures and diverse morphologies. In particular, these effects can have a significant influence on the chemical composition of the particle–vapor interface. In this work, we investigate the bulk/surface partitioning of inorganic ions, Na(+), Mg(2 +), Ca(2 +), Cl(−) and Br(−), in atomiser-generated submicron aerosols using synchrotron radiation based X-ray photoelectron spectroscopy (XPS). Specifically, the chemical compositions of the outermost few nm thick surface layers of non-supported MgCl(2)/CaCl(2) and NaBr/MgBr(2) particles are determined. It is found that in MgCl(2)/CaCl(2) particles, the relative abundance of the two species in the particle surface correlates well with their mixing ratio in the parent aqueous solution. In stark contrast, extreme surface enrichment of Mg(2 +) is observed in NaBr/MgBr(2) particles formed from both aqueous and organic solution droplets, indicative of core–shell structures. Structural properties and hydration state of the particles are discussed. The Royal Society of Chemistry 2022-01-14 /pmc/articles/PMC8809137/ /pubmed/35060587 http://dx.doi.org/10.1039/d1cp04953d Text en This journal is © the Owner Societies https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Pelimanni, Eetu
Saak, Clara-Magdalena
Michailoudi, Georgia
Prisle, Nønne
Huttula, Marko
Patanen, Minna
Solvent and cosolute dependence of Mg surface enrichment in submicron aerosol particles
title Solvent and cosolute dependence of Mg surface enrichment in submicron aerosol particles
title_full Solvent and cosolute dependence of Mg surface enrichment in submicron aerosol particles
title_fullStr Solvent and cosolute dependence of Mg surface enrichment in submicron aerosol particles
title_full_unstemmed Solvent and cosolute dependence of Mg surface enrichment in submicron aerosol particles
title_short Solvent and cosolute dependence of Mg surface enrichment in submicron aerosol particles
title_sort solvent and cosolute dependence of mg surface enrichment in submicron aerosol particles
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8809137/
https://www.ncbi.nlm.nih.gov/pubmed/35060587
http://dx.doi.org/10.1039/d1cp04953d
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