We investigate the kinetics and the free energy landscape of the crystallization of hard spheres from a supersaturated metastable liquid though direct simulations and forward flux sampling. In this first paper, we describe and test two different ways to reconstruct the free energy barriers from the sampled steady state probability distribution of cluster sizes without sampling the equilibrium distribution. The first method is based on mean first passage times, and the second method is based on splitting probabilities. We verify both methods for a single particle moving in a double-well potential. For the nucleation of hard spheres, these methods allow us to probe a wide range of supersaturations and to reconstruct the kinetics and the free energy landscape from the same simulation. Results are consistent with the scaling predicted by classical nucleation theory although a quantitative fit requires a rather large effective interfacial tension.
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28 March 2018
Research Article|
March 27 2018
Crystallization of hard spheres revisited. I. Extracting kinetics and free energy landscape from forward flux sampling
David Richard;
David Richard
Institut für Physik, Johannes Gutenberg-Universität Mainz
, Staudingerweg 7-9, 55128 Mainz, Germany
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Thomas Speck
Thomas Speck
Institut für Physik, Johannes Gutenberg-Universität Mainz
, Staudingerweg 7-9, 55128 Mainz, Germany
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J. Chem. Phys. 148, 124110 (2018)
Article history
Received:
November 17 2017
Accepted:
March 13 2018
Connected Content
A companion article has been published:
Crystallization of hard spheres revisited. II. Thermodynamic modeling, nucleation work, and the surface of tension
Citation
David Richard, Thomas Speck; Crystallization of hard spheres revisited. I. Extracting kinetics and free energy landscape from forward flux sampling. J. Chem. Phys. 28 March 2018; 148 (12): 124110. https://doi.org/10.1063/1.5016277
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