Active structuring of colloidal armour on liquid drops

Paul Dommersnes, Zbigniew Rozynek, Alexander Mikkelsen, Rene Castberg, Knut Kjerstad, Kjetil Hersvik and Jon Otto Fossum ()
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Paul Dommersnes: Norwegian University of Science and Technology
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

Nature Communications, 2013, vol. 4, issue 1, 1-8

Abstract: 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.

Date: 2013
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DOI: 10.1038/ncomms3066

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