When like charges attract: Interactions and dynamics in charge-stabilized colloidal suspensions

David G. Grier

    Research output: Contribution to journalArticle


    Measured pair interactions among highly charged colloidal spheres dispersed in simple electrolytes yield several surprises. Isolated pairs of like-charged spheres are found to repel each other, much as predicted by conventional theory. The same spheres, however, can develop a strong and long-ranged attraction for each other when confined either by charged glass walls, or by neighbouring spheres. Such like-charge attractions are inconsistent with the mean-field theory for macroionic interactions. These and other experimental observations further constrain recently proposed extensions to the mean-field theory.

    Original languageEnglish (US)
    Pages (from-to)A85-A94
    JournalJournal of Physics Condensed Matter
    Issue number8A
    StatePublished - Jan 1 2000


    ASJC Scopus subject areas

    • Materials Science(all)
    • Condensed Matter Physics

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