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Gel, glass and nematic states of plate-like particle suspensions: charge anisotropy and size effects

Delhorme, Maxime LU ; Jönsson, Bo LU and Labbez, Christophe (2014) In RSC Advances 4(66). p.34793-34800
Abstract
The influence of the charge anisotropy and platelet size on the formation of gel and glass states and nematic phases in suspensions of plate-like particles is investigated using Monte Carlo simulations in the canonical ensemble. The platelets are modeled as discs with charged sites distributed on a hexagonal lattice. The edge sites can carry a positive charge, while the remaining sites are negatively charged giving rise to a charge anisotropy. A screened Coulomb potential plus a short range repulsive potential are used to describe the interactions between the sites of the platelets. The liquid-gel transition is found to be favored by a high charge anisotropy and by large particles. Oppositely, the liquid-glass transition is favored for... (More)
The influence of the charge anisotropy and platelet size on the formation of gel and glass states and nematic phases in suspensions of plate-like particles is investigated using Monte Carlo simulations in the canonical ensemble. The platelets are modeled as discs with charged sites distributed on a hexagonal lattice. The edge sites can carry a positive charge, while the remaining sites are negatively charged giving rise to a charge anisotropy. A screened Coulomb potential plus a short range repulsive potential are used to describe the interactions between the sites of the platelets. The liquid-gel transition is found to be favored by a high charge anisotropy and by large particles. Oppositely, the liquid-glass transition is favored for small particles without charge anisotropy, i.e., fully negatively charged. Finally, we find that the isotropic/nematic transition is disfavored by the charge anisotropy. For a strong charge anisotropy, the nematic phase does not form and, instead, a gel/columnar transition is found. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
RSC Advances
volume
4
issue
66
pages
34793 - 34800
publisher
Royal Society of Chemistry
external identifiers
  • wos:000341287700011
  • scopus:84906536024
ISSN
2046-2069
DOI
10.1039/c4ra05555a
language
English
LU publication?
yes
id
7dde22f5-2b8b-4fee-923a-3cae8bca01b7 (old id 4717114)
date added to LUP
2014-10-31 09:55:55
date last changed
2017-10-22 04:08:49
@article{7dde22f5-2b8b-4fee-923a-3cae8bca01b7,
  abstract     = {The influence of the charge anisotropy and platelet size on the formation of gel and glass states and nematic phases in suspensions of plate-like particles is investigated using Monte Carlo simulations in the canonical ensemble. The platelets are modeled as discs with charged sites distributed on a hexagonal lattice. The edge sites can carry a positive charge, while the remaining sites are negatively charged giving rise to a charge anisotropy. A screened Coulomb potential plus a short range repulsive potential are used to describe the interactions between the sites of the platelets. The liquid-gel transition is found to be favored by a high charge anisotropy and by large particles. Oppositely, the liquid-glass transition is favored for small particles without charge anisotropy, i.e., fully negatively charged. Finally, we find that the isotropic/nematic transition is disfavored by the charge anisotropy. For a strong charge anisotropy, the nematic phase does not form and, instead, a gel/columnar transition is found.},
  author       = {Delhorme, Maxime and Jönsson, Bo and Labbez, Christophe},
  issn         = {2046-2069},
  language     = {eng},
  number       = {66},
  pages        = {34793--34800},
  publisher    = {Royal Society of Chemistry},
  series       = {RSC Advances},
  title        = {Gel, glass and nematic states of plate-like particle suspensions: charge anisotropy and size effects},
  url          = {http://dx.doi.org/10.1039/c4ra05555a},
  volume       = {4},
  year         = {2014},
}