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Structural transitions of encapsidated polyelectrolytes.

Angelescu, Daniel LU ; Linse, Per LU ; Nguyen, T T and Bruinsma, R F (2008) In European Physical Journal E. Soft Matter 25(3). p.323-334
Abstract
Conformations and structural transitions of polyelectrolytes strictly confined onto a spherical 2D surface have been investigated by scaling descriptions based on physical arguments concerning polyelectrolyte adsorption onto planar surface and liquid crystals as well as by Monte Carlo simulations using a bead-spring model with short-range and electrostatic repulsions. In case of the electrostatic screened regime, a disordered-ordered (spiral) transition at increasing persistence length of the chain was found. It was predicted that the transition occurred when the persistence length is comparable with the mean spacing between adjacent strands of the ordered chain. The presence of a non-screened electrostatic repulsion led to a more complex... (More)
Conformations and structural transitions of polyelectrolytes strictly confined onto a spherical 2D surface have been investigated by scaling descriptions based on physical arguments concerning polyelectrolyte adsorption onto planar surface and liquid crystals as well as by Monte Carlo simulations using a bead-spring model with short-range and electrostatic repulsions. In case of the electrostatic screened regime, a disordered-ordered (spiral) transition at increasing persistence length of the chain was found. It was predicted that the transition occurred when the persistence length is comparable with the mean spacing between adjacent strands of the ordered chain. The presence of a non-screened electrostatic repulsion led to a more complex behavior with i) a re-entrant order-disorder transition and ii) a tennis ball texture as an additional smectic/nematic structure. The various competing structures given by the theory were recovered by the Monte Carlo simulations, which also indicated that the tennis ball texture was favored over the spiral structure by the long-range interactions for semi-flexible chains. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
European Physical Journal E. Soft Matter
volume
25
issue
3
pages
323 - 334
publisher
Springer
external identifiers
  • wos:000254906800008
  • pmid:18385931
  • scopus:42149126011
ISSN
1292-8941
DOI
10.1140/epje/i2007-10301-6
language
English
LU publication?
yes
id
b2027b79-60f8-4c2c-b66f-85767bb738cc (old id 1147828)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/18385931?dopt=Abstract
date added to LUP
2008-05-26 09:30:27
date last changed
2017-01-01 05:50:37
@article{b2027b79-60f8-4c2c-b66f-85767bb738cc,
  abstract     = {Conformations and structural transitions of polyelectrolytes strictly confined onto a spherical 2D surface have been investigated by scaling descriptions based on physical arguments concerning polyelectrolyte adsorption onto planar surface and liquid crystals as well as by Monte Carlo simulations using a bead-spring model with short-range and electrostatic repulsions. In case of the electrostatic screened regime, a disordered-ordered (spiral) transition at increasing persistence length of the chain was found. It was predicted that the transition occurred when the persistence length is comparable with the mean spacing between adjacent strands of the ordered chain. The presence of a non-screened electrostatic repulsion led to a more complex behavior with i) a re-entrant order-disorder transition and ii) a tennis ball texture as an additional smectic/nematic structure. The various competing structures given by the theory were recovered by the Monte Carlo simulations, which also indicated that the tennis ball texture was favored over the spiral structure by the long-range interactions for semi-flexible chains.},
  author       = {Angelescu, Daniel and Linse, Per and Nguyen, T T and Bruinsma, R F},
  issn         = {1292-8941},
  language     = {eng},
  number       = {3},
  pages        = {323--334},
  publisher    = {Springer},
  series       = {European Physical Journal E. Soft Matter},
  title        = {Structural transitions of encapsidated polyelectrolytes.},
  url          = {http://dx.doi.org/10.1140/epje/i2007-10301-6},
  volume       = {25},
  year         = {2008},
}