Hydrodynamic pair attractions between driven colloidal particles

Yulia Sokolov, Derek Frydel, David G. Grier, Haim Diamant, Yael Roichman

    Research output: Contribution to journalArticle

    Abstract

    Colloidal spheres driven through water along a circular path by an optical ring trap display unexpected dynamical correlations. We use Stokesian dynamics simulations and a simple analytical model to demonstrate that the path's curvature breaks the symmetry of the two-body hydrodynamic interaction, resulting in particle pairing. The influence of this effective nonequilibrium attraction diminishes as either the temperature or the stiffness of the radial confinement increases. We find a well-defined set of dynamically paired states whose stability relies on hydrodynamic coupling in curving trajectories.

    Original languageEnglish (US)
    Article number158302
    JournalPhysical Review Letters
    Volume107
    Issue number15
    DOIs
    StatePublished - Oct 6 2011

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    attraction
    hydrodynamics
    stiffness
    curvature
    trajectories
    traps
    rings
    symmetry
    water
    simulation
    interactions
    temperature

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Sokolov, Y., Frydel, D., Grier, D. G., Diamant, H., & Roichman, Y. (2011). Hydrodynamic pair attractions between driven colloidal particles. Physical Review Letters, 107(15), [158302]. https://doi.org/10.1103/PhysRevLett.107.158302

    Hydrodynamic pair attractions between driven colloidal particles. / Sokolov, Yulia; Frydel, Derek; Grier, David G.; Diamant, Haim; Roichman, Yael.

    In: Physical Review Letters, Vol. 107, No. 15, 158302, 06.10.2011.

    Research output: Contribution to journalArticle

    Sokolov, Y, Frydel, D, Grier, DG, Diamant, H & Roichman, Y 2011, 'Hydrodynamic pair attractions between driven colloidal particles', Physical Review Letters, vol. 107, no. 15, 158302. https://doi.org/10.1103/PhysRevLett.107.158302
    Sokolov, Yulia ; Frydel, Derek ; Grier, David G. ; Diamant, Haim ; Roichman, Yael. / Hydrodynamic pair attractions between driven colloidal particles. In: Physical Review Letters. 2011 ; Vol. 107, No. 15.
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