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SUMMARY:Colloidal Doping of Cholesterics and Blue Phases - Cates\, M (Univ
 ersity of Edinburgh)
DTSTART:20130625T084500Z
DTEND:20130625T093000Z
UID:TALK45898@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:At the interface between a cholesteric phase and an isotropic 
 fluid\, an array of defects arises. This creates for embedded colloidal pa
 rticles a free energy landscape that depends on the ratio of colloid size 
 to cholesteric pitch and on the strength of anchoring at the colloid-chole
 steric interface. I shall outline recent experiments and simulations that 
 probe this landscape. A somewhat similar situation arises when colloids ar
 e added to blue phases\, for which the defect array is not interfacial but
  permeates the bulk phase. Preliminary simulations suggest a variety of st
 ructures\, many metastable\, with interesting transitions inducible by ext
 ernal fields and/or flow.\n\n
LOCATION:Seminar Room 1 Newton Institute
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