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Active structuring of colloidal armour on liquid drops

Author

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  • Paul Dommersnes

    (Norwegian University of Science and Technology
    University of Oslo
    Laboratoire Matière et Systèmes Complexes, Université Paris 7 Diderot
    Centre for Advanced Study, Norwegian Academy of Science and Letters)

  • Zbigniew Rozynek

    (Norwegian University of Science and Technology)

  • Alexander Mikkelsen

    (Norwegian University of Science and Technology)

  • Rene Castberg

    (University of Oslo)

  • Knut Kjerstad

    (Norwegian University of Science and Technology)

  • Kjetil Hersvik

    (Norwegian University of Science and Technology)

  • Jon Otto Fossum

    (Norwegian University of Science and Technology
    Centre for Advanced Study, Norwegian Academy of Science and Letters)

Abstract

Adsorption and assembly of colloidal particles at the surface of liquid droplets are at the base of particle-stabilized emulsions and templating. Here we report that electrohydrodynamic and electro-rheological effects in leaky-dielectric liquid drops can be used to structure and dynamically control colloidal particle assemblies at drop surfaces, including electric-field-assisted convective assembly of jammed colloidal ‘ribbons’, electro-rheological colloidal chains confined to a two-dimensional surface and spinning colloidal domains on that surface. In addition, we demonstrate the size control of ‘pupil’-like openings in colloidal shells. We anticipate that electric field manipulation of colloids in leaky dielectrics can lead to new routes of colloidosome assembly and design for ‘smart armoured’ droplets.

Suggested Citation

  • Paul Dommersnes & Zbigniew Rozynek & Alexander Mikkelsen & Rene Castberg & Knut Kjerstad & Kjetil Hersvik & Jon Otto Fossum, 2013. "Active structuring of colloidal armour on liquid drops," Nature Communications, Nature, vol. 4(1), pages 1-8, October.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3066
    DOI: 10.1038/ncomms3066
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