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Stability of nanoparticle laden aerosol liquid droplets

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journal contribution
posted on 2023-11-23, 14:58 authored by Andrew ArcherAndrew Archer, BD Goddard, R Roth
We develop a model for the thermodynamics and evaporation dynamics of aerosol droplets of a liquid, such as water, surrounded by gas. When the temperature and the chemical potential (or equivalently the humidity) are such that the vapor phase is in the thermodynamic equilibrium state, then, of course, droplets of the pure liquid evaporate over a relatively short time. However, if the droplets also contain nanoparticles or any other non-volatile solute, then the droplets can become thermodynamically stable. We show that the equilibrium droplet size depends strongly on the amount and solubility of the nanoparticles within, i.e., on the nature of the particle interactions with the liquid and, of course, also on the vapor temperature and chemical potential. We develop a simple thermodynamic model for such droplets and compare predictions with results from a lattice density functional theory that takes as input the same particle interaction properties, finding very good agreement. We also use dynamical density functional theory to study the evaporation/condensation dynamics of liquid from/to droplets as they equilibrate with the vapor, thereby demonstrating droplet stability.

Funding

London Mathematical Societ

International Centre for Mathematical Sciences

Loughborough University Institute of Advanced Studies

History

School

  • Science

Department

  • Mathematical Sciences

Published in

The Journal of Chemical Physics

Volume

159

Issue

19

Publisher

AIP Publishing

Version

  • VoR (Version of Record)

Rights holder

© Author(s)

Publisher statement

This is an Open Access article published by AIP Advances. All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Acceptance date

2023-10-26

Publication date

2023-11-20

Copyright date

2023

ISSN

0021-9606

eISSN

1089-7690

Language

  • en

Depositor

Prof Andrew Archer. Deposit date: 22 November 2023

Article number

194503

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