The microscopic dynamics of freezing in supercooled colloidal fluids

David G. Grier, Cherry A. Murray

    Research output: Contribution to journalArticle

    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
    StatePublished - 1994

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    Freezing
    freezing
    Crystallization
    Crystallites
    crystallites
    Fluids
    fluids
    crystallization
    Liquid phase epitaxy
    liquid phase epitaxy
    containers
    solidification
    shear stress
    Containers
    Solidification
    Shear stress
    Microscopic examination
    Casting
    Nucleation
    diffusion coefficient

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

    Cite this

    The microscopic dynamics of freezing in supercooled colloidal fluids. / Grier, David G.; Murray, Cherry A.

    In: The Journal of chemical physics, Vol. 100, No. 12, 1994, p. 9088-9095.

    Research output: Contribution to journalArticle

    Grier, DG & Murray, CA 1994, 'The microscopic dynamics of freezing in supercooled colloidal fluids', The Journal of chemical physics, vol. 100, no. 12, pp. 9088-9095.
    Grier, David G. ; Murray, Cherry A. / The microscopic dynamics of freezing in supercooled colloidal fluids. In: The Journal of chemical physics. 1994 ; Vol. 100, No. 12. pp. 9088-9095.
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