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Ion adsorption and Lamellar-Lamellar transitions in charged bilayer systems

Forsman, Jan LU (2006) In Langmuir 22(7). p.2975-2978
Abstract
Using a primitive model approach, we analyze the influence of ion specific adsorption on the phase behavior of charged lamellar systems. The presence of a weak short-ranged surface potential, attracting monovalent counterions, induces a phase separation, where the separate phases have different repeat distance. If the adsorption potential is very weak, the more narrow phase never forms. An opposite behavior is found for strong surface affinities. Both Monte Carlo simulations and a recently developed correlation-corrected Poisson-Boltzmann theory are adopted, with a nearly quantitative agreement between the approaches. Different counterions are discriminated by the adsorption potential strength, and with physically reasonable values,... (More)
Using a primitive model approach, we analyze the influence of ion specific adsorption on the phase behavior of charged lamellar systems. The presence of a weak short-ranged surface potential, attracting monovalent counterions, induces a phase separation, where the separate phases have different repeat distance. If the adsorption potential is very weak, the more narrow phase never forms. An opposite behavior is found for strong surface affinities. Both Monte Carlo simulations and a recently developed correlation-corrected Poisson-Boltzmann theory are adopted, with a nearly quantitative agreement between the approaches. Different counterions are discriminated by the adsorption potential strength, and with physically reasonable values, experimental observations on these systems are well reproduced. The study highlights the importance of electrostatic correlations, even though only monovalent ions are present. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
22
issue
7
pages
2975 - 2978
publisher
The American Chemical Society (ACS)
external identifiers
  • wos:000236843300014
  • scopus:33645499349
ISSN
0743-7463
DOI
10.1021/la0600393
language
English
LU publication?
yes
additional info
The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Theoretical Chemistry (S) (011001039)
id
ecbc973e-7ef4-4c02-a366-28671275a156 (old id 413982)
date added to LUP
2016-04-01 11:57:54
date last changed
2020-02-26 03:04:45
@article{ecbc973e-7ef4-4c02-a366-28671275a156,
  abstract     = {Using a primitive model approach, we analyze the influence of ion specific adsorption on the phase behavior of charged lamellar systems. The presence of a weak short-ranged surface potential, attracting monovalent counterions, induces a phase separation, where the separate phases have different repeat distance. If the adsorption potential is very weak, the more narrow phase never forms. An opposite behavior is found for strong surface affinities. Both Monte Carlo simulations and a recently developed correlation-corrected Poisson-Boltzmann theory are adopted, with a nearly quantitative agreement between the approaches. Different counterions are discriminated by the adsorption potential strength, and with physically reasonable values, experimental observations on these systems are well reproduced. The study highlights the importance of electrostatic correlations, even though only monovalent ions are present.},
  author       = {Forsman, Jan},
  issn         = {0743-7463},
  language     = {eng},
  number       = {7},
  pages        = {2975--2978},
  publisher    = {The American Chemical Society (ACS)},
  series       = {Langmuir},
  title        = {Ion adsorption and Lamellar-Lamellar transitions in charged bilayer systems},
  url          = {http://dx.doi.org/10.1021/la0600393},
  doi          = {10.1021/la0600393},
  volume       = {22},
  year         = {2006},
}