Precursor-mediated crystallization process in suspensions of hard spheres

Abstract

We report on a large scale computer simulation study of crystal nucleation in hard spheres. Through a combined analysis of real and reciprocal space data, a picture of a two-step crystallization process is supported: First dense, amorphous clusters form which then act as precursors for the nucleation of well-ordered crystallites. This kind of crystallization process has been previously observed in systems that interact via potentials that have an attractive as well as a repulsive part, most prominently in protein solutions. In this context the effect has been attributed to the presence of metastable fluid-fluid demixing. Our simulations, however, show that a purely repulsive system (that has no metastable fluid-fluid coexistence) crystallizes via the same mechanism.

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References in corpus (4)

• Direct calculation of the hard-sphere crystal/melt interfacial free energy
• Theoretical evidence for a dense fluid precursor to crystallization
• The Monte-Carlo dynamics of a binary Lennard-Jones glass-forming mixture
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