Issue 37, 2024

Atomic scale insights into NaCl nucleation in nanoconfined environments

Abstract

In this work we examine the nucleation from NaCl aqueous solutions within nano-confined environments, employing enhanced sampling molecular dynamics simulations integrated with machine learning-derived reaction coordinates. Through our simulations, we successfully induce phase transitions between solid, liquid, and a hydrated phase, typically observed at lower temperatures in bulk environments. Interestingly, while generally speaking nano-confinement serves to stabilize the solid phase and elevate melting points, there are subtle variations in the thermodynamics of competing phases with the precise extent of confinement. Our simulations explain these findings by underscoring the significant role of water, alongside ion aggregation and subtle, anisotropic dielectric behavior, in driving nucleation within nano-confined environments. This report thus provides a framework for sampling, analyzing and understanding nucleation processes under nano-confinement.

Graphical abstract: Atomic scale insights into NaCl nucleation in nanoconfined environments

Supplementary files

Article information

Article type
Edge Article
Submitted
20 Jun 2024
Accepted
23 Aug 2024
First published
23 Aug 2024
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2024,15, 15391-15398

Atomic scale insights into NaCl nucleation in nanoconfined environments

R. Wang and P. Tiwary, Chem. Sci., 2024, 15, 15391 DOI: 10.1039/D4SC04042B

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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