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Stability of nanoparticle laden aerosol liquid droplets
journal contributionposted 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.
London Mathematical Societ
International Centre for Mathematical Sciences
Loughborough University Institute of Advanced Studies
- Mathematical Sciences
Published inThe Journal of Chemical Physics
- VoR (Version of Record)
Rights holder© Author(s)
Publisher statementThis 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/).