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SUMMARY:Simulation of armoured and swollen vesicles - Cheung\, D (Universi
 ty of Warwick)
DTSTART:20130322T160000Z
DTEND:20130322T162000Z
UID:TALK44209@talks.cam.ac.uk
CONTACT:Mustapha Amrani
DESCRIPTION:Polymer vesicles\, fluid filled polymer sacs\, have attracted 
 much attention for applications such as drug delivery vehicles\, miniature
  chemical reactors\, or as synthetic\, minimal cells. In these application
 s the vehicles may undergo significant changes in osmotic pressure\, pH\, 
 or concentration\, which may lead to vesicle rupture or collapse. In order
  to avoid this a number of possible strategies may be used to stabilise ve
 sicles against changes in external environment.  In this talk I will discu
 ss some recent simulation work studying two of these - armouring and swell
 ing.\n\nRecently it has been shown that polymer vesicles may be coated wit
 h a layer of colloidal particles that armour these\, in a similar manner t
 o some biological systems. Simple Monte Carlo simulations were used to rep
 roduce the packing patterns seen in these experimental systems and to stud
 y the effect of surface charge density on the self-assembly [1]. Dissipati
 ve particle dynamics simulations were used to study the swelling of a poly
 mer bilayer when exposed to small hydrophobic molecules. Above a critical 
 density of hydrophobic molecules the bilayer undergoes a morphological tra
 nsition characterised by the formation of a bud within the bilayer\, consi
 stent with experimental observations of polymer vesicles [2].\n\n[1] R Che
 n\, DJG Pearce\, S Fortuna\, DL Cheung\, and SAF Bon\, J Am Chem Soc\, 133
 \, 2151 (2011)\n[2] CDJ Parmenter\, R Chen\, DL Cheung\, and SAF Bon\, Sof
 t Matter\, in press\n\n
LOCATION:Seminar Room 1\, Newton Institute
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