Translation-rotation coupling in dense colloidal suspensions

ORAL

Abstract

Single-particle tracking has been used to contrast translational and rotational diffusion in colloidal suspensions. Not enough is known from prior study about the rotation of colloids, owing perhaps to the paucity of suitable measurements techniques, but this is now remedied by using Modulated Optical Nanoparticles(MOONs), which are fabricated by capping one hemisphere with a thin layer of reflective metal. Density of the suspensions is varied and both translational and rotational mean squared displacement are quantified.

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Authors

  • Minsu Kim

    Department of Physics, University of Illinois, Dept. of Physics, University of Illinois at Urbana and Champaign

  • Stephen Anthony

    Department of Chemistry, University of Illinois, Dept of Chemistry, Univ of Illinois at Urbana-Champaign, Dept. of Chemistry, University of Illinois at Urbana and Champaign

  • Steve Granick

    Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, University of Illinois at Urbana-Champaign, University of Illinois, Dept of Materials Science and Engineering, Univ of Illinois at Urbana-Champaign, Dept. of Material Science and Engineering, University of Illinois at Urbana and Champaign