Translation-rotation coupling in concentrated colloidal suspensions

POSTER

Abstract

Single-particle tracking has been used to contrast translational and rotational diffusion in monodisperse colloidal suspensions. Visualization of angular motion reveals that rotation has different properties from translation. Collective motions of particles lead to subdiffusive rotation. Deviations from Fickian motion increase as the volume fraction increases above 50{\%}. Translational and rotational coupling of a single particle is measured directly for the first time and its dependence on the volume fraction is discussed.

Authors

  • Minsu Kim

    • Physics, UIUC

  • Stephen Anthony

    • Department of Chemistry, University of Illinois
    • Chemistry, UIUC
    • Dept of Chemistry, University of Illinois at Urbana-Champaign
    • University of Illinois
    • Dept of Chemistry, Univ of Illinois at Urbana-Champaign

  • Steve Granick

    • Department of Materials Science and Engineering, University of Illinois
    • University of Illinois, Urbana-Champaign
    • material science and engineering, UIUC
    • Materials Science and Engineering, University of Illinois
    • Dept of Materials Science \& Engineering, University of Illinois at Urbana-Champaign
    • Dept. Materials Science and Engineering, University of Illinois at Urbana-Champaign
    • University of Illinois at Urbana-Champaign
    • University of Illinois
    • Dept of Materials Science \& Engineering, Univ of Illinois at Urbana-Champaign
    • Material Science and Engineering, UIUC