Weak long-ranged Casimir attraction in colloidal crystals

A. Gopinathan, T. Zhou, S. N. Coppersmith, L. P. Kadanoff, D. G. Grier

    Research output: Contribution to journalArticlepeer-review


    We investigate the influence of geometric confinement on the free energy of an idealized model for charge-stabilized colloidal suspensions. The mean-field Poisson-Boltzmann formulation for this system predicts pure repulsion among macroionic colloidal spheres. Fluctuations in the simple ions' distribution provide a mechanism for the macroions to attract each other at large separations. Although this Casimir interaction is long-ranged, it is too weak to influence colloidal crystals' properties.

    Original languageEnglish (US)
    Pages (from-to)451-457
    Number of pages7
    JournalEurophysics Letters
    Issue number3
    StatePublished - 2002

    ASJC Scopus subject areas

    • General Physics and Astronomy


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