Janus particles on colloidosomes (Pickering emulsions) and the role of added surfactant

ORAL

Abstract

We describe systematically the synergy between particle and surfactant in stabilizing colloidosomes. Special attention is given to what determines the inversion between O/W and W/O emulsions, the so-called `catastrophic phase inversion'. At the onset of the catastrophic phase inversion, we find an exceptional double-emulsion structure. Extending this idea, we find that when the dispersed phase is frozen by lowering the temperature below its solid-liquid phase transition, particles can be locked at the interface and further chemically modified into Janus colloidal particles. This affords an easy way to produce Janus colloidal particles with versatile chemical makeup in large quantity.

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Authors

  • Shan Jiang

    Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign

  • Liang Hong

    Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, University of Illinois at Urbana-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