Active structuring of colloidal armour on liquid drops

Article English OPEN
Dommersnes, Paul ; Rozynek, Zbigniew ; Mikkelsen, Alexander ; Castberg, Rene ; Kjerstad, Knut ; Hersvik, Kjetil ; Fossum, Jon Otto (2013)
  • Publisher: Nature Publishing Group
  • Journal: volume 4 (issn: 2041-1723, eissn: 2041-1723)
  • Related identifiers: doi: 10.1038/ncomms3066, pmc: PMC4355650
  • Subject: Article
    mesheuropmc: endocrine system | complex mixtures | body regions | digestive, oral, and skin physiology

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-fieldassisted 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. This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by-nc-sa/3.0/
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