Theoretical prediction of crystallization kinetics of a supercooled Lennard-Jones fluid

KGSH Gunawardana and XY Song, JOURNAL OF CHEMICAL PHYSICS, 148, 204506 (2018).

DOI: 10.1063/1.5021944

The first order curvature correction to the crystal-liquid interfacial free energy is calculated using a theoretical model based on the interfacial excess thermodynamic properties. The correction parameter (delta), which is analogous to the Tolman length at a liquid-vapor interface, is found to be 0.48 +/- 0.05 for a Lennard-Jones (LJ) fluid. We show that this curvature correction is crucial in predicting the nucleation barrier when the size of the crystal nucleus is small. The thermodynamic driving force (Delta mu) corresponding to available simulated nucleation conditions is also calculated by combining the simulated data with a classical density functional theory. In this paper, we show that the classical nucleation theory is capable of predicting the nucleation barrier with excellent agreement to the simulated results when the curvature correction to the interfacial free energy is accounted for. Published by AIP Publishing.

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