The microscopic dynamics of freezing in supercooled colloidal fluids

David G. Grier, Cherry A. Murray

Research output: Contribution to journalArticlepeer-review

112 Scopus citations

Abstract

Using time-resolved digital video microscopy, we have tracked the reemergence of order in charge-stabilized colloidal crystals which have been shear melted into isotropic fluids. Crystallization is heterogeneously nucleated by the smooth walls of the sample container. This process is analogous to the solidification of conventional materials during casting or liquid phase epitaxy. The nonequilibrium freezing transition proceeds through the gradual formation of a layered fluid near the repulsive wall, subsequent evolution of local order within the first fluid layer, and ultimately rapid crystallization. After nucleation and initial growth, crystallites are observed to fracture, perhaps due to shear stresses imposed by neighboring crystallites. Microscopic measurements of the nonequilibrium self-diffusion coefficient are consistent with the dynamical freezing criterion recently proposed for systems in equilibrium by Löwen et al. [Phys. Rev. Lett. 70, 1557 (1993)].

Original languageEnglish (US)
Pages (from-to)9088-9095
Number of pages8
JournalThe Journal of chemical physics
Volume100
Issue number12
DOIs
StatePublished - 1994
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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