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SUMMARY:Self-assembly of jammed heterogeneous colloidal shells by combinin
 g electrohydrodynamics and dielectrophoresis - Prof. Jon Otto Fossum\, Dep
 artment of Physics\, Norwegian University of Science and Technology (NTNU)
DTSTART:20161110T140000Z
DTEND:20161110T150000Z
UID:TALK68145@talks.cam.ac.uk
CONTACT:Sharon Connor
DESCRIPTION:Adsorption and assembly of colloidal particles at the surface 
 of liquid droplets are at the base of particle-stabilized emulsions and te
 mplating. It has been demonstrated that electrohydrodynamic and dielectrop
 horetic effects in leaky-dielectric liquid drops can be used to structure 
 and dynamically control colloidal particle assemblies at drop surfaces [1]
 \, suggesting new routes for Janus or patchy colloidosome assembly\, inclu
 ding jammed colloidal shells(Pickering drops) with designed heterogeneous 
 surfaces that combine the functionalities offered by Janus or patchy parti
 cles\, and those given by permeable shells such as colloidosomes [2]. It h
 as also been demonstrated that the stress induced by uniform electric-fiel
 ds incolloidal jammed Pickering drops\, is absorbed by plastic deformation
  or surface crumpling\, at electric fields above a yield stress. At strong
 er electric fields\, simultaneous deformation and spontaneous electrohydro
 dynamic rotation of Pickering drops has been observed\, followed by a tran
 sition from a solid to a liquid state and tank-treading dynamics of the Pi
 ckering particle layer [3]\, as well as emergence of paired colloidosome s
 wimmers [4].\n\n1. Dommersnes P.\, Rozynek Z.\, Mikkelsen M.\, Castberg R.
  \, Kjerstad\, K.\, Hersvik K.\, Fossum J.O. (2013) Active structuring of 
 colloidal armour on liquid drops\, Nature Communications 4:2066\n2. Rozyne
 k Z.\, Mikkelsen A.\, Dommersnes P.\, Fossum J.O. (2016)\, Electroformatio
 n of Janus and patchy capsules\, Nature Communications\, 5:3945\n3. A. Mik
 kelsen\, P. Dommersnes\, Z. Rozynek\, A. Gholamipour-Shirazi\, M. S. Carva
 lho and J.O. Fossum (2016) Mechanics and rheology of Pickering drops probe
 d by electric field induced stress\, In preparation for submission\n4. P. 
 Dommersnes\, A. Mikkelsen & J. O. Fossum (2016) Electro-hydrodynamic propu
 lsion of counter-rotating Pickering drops\,  European Physical Journal Spe
 cial Topics 225\, 699–705
LOCATION:Wolfson Lecture Theatre\,  Department of Chemistry
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