Repulsion between oppositely charged macromolecules or particles
Trulsson, Martin LU
; Jönsson, Bo
LU
; Åkesson, Torbjörn
LU
; Forsman, Jan
LU
and Labbez, Christophe
LU
(2007)
In Langmuir
23(23).
p.11562-11569
- Abstract
- The interaction of two oppositely charged surfaces has been investigated using Monte Carlo simulations and approximate analytical methods. When immersed in an aqueous electrolyte containing only monovalent ions, two such surfaces will generally show an attraction at large and intermediate separations. However, if the electrolyte solution contains divalent or multivalent ions, then a repulsion can appear at intermediate separations. The repulsion increases with increasing concentration of the multivalent salt as well as with the valency of the multivalent ion. The addition of a second salt with only monovalent ions magnifies the effect. The repulsion between oppositely charged surfaces is an effect of ion-ion correlations, and it increases... (More)
- The interaction of two oppositely charged surfaces has been investigated using Monte Carlo simulations and approximate analytical methods. When immersed in an aqueous electrolyte containing only monovalent ions, two such surfaces will generally show an attraction at large and intermediate separations. However, if the electrolyte solution contains divalent or multivalent ions, then a repulsion can appear at intermediate separations. The repulsion increases with increasing concentration of the multivalent salt as well as with the valency of the multivalent ion. The addition of a second salt with only monovalent ions magnifies the effect. The repulsion between oppositely charged surfaces is an effect of ion-ion correlations, and it increases with increasing electrostatic coupling and, for example, a lowering of the dielectric permittivity enhances the effect. An apparent charge reversal of the surface neutralized by the multivalent ion is always observed together with a repulsion at large separation, whereas at intermediate separations a repulsion can appear without charge reversal. The effect is hardly observable for a symmetric multivalent salt (e.g., 2:2 or 3:3). (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/653065
- author
- Trulsson, Martin
LU
; Jönsson, Bo
LU
; Åkesson, Torbjörn
LU
; Forsman, Jan
LU
and Labbez, Christophe
LU
- organization
- publishing date
- 2007
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Langmuir
- volume
- 23
- issue
- 23
- pages
- 11562 - 11569
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000250584500039
- scopus:36248956225
- ISSN
- 0743-7463
- DOI
- 10.1021/la701222b
- 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
- d345eaf8-b69c-4c2d-a765-bd22d43161b2 (old id 653065)
- date added to LUP
- 2016-04-01 12:07:24
- date last changed
- 2023-01-03 04:12:56
@article{d345eaf8-b69c-4c2d-a765-bd22d43161b2,
abstract = {{The interaction of two oppositely charged surfaces has been investigated using Monte Carlo simulations and approximate analytical methods. When immersed in an aqueous electrolyte containing only monovalent ions, two such surfaces will generally show an attraction at large and intermediate separations. However, if the electrolyte solution contains divalent or multivalent ions, then a repulsion can appear at intermediate separations. The repulsion increases with increasing concentration of the multivalent salt as well as with the valency of the multivalent ion. The addition of a second salt with only monovalent ions magnifies the effect. The repulsion between oppositely charged surfaces is an effect of ion-ion correlations, and it increases with increasing electrostatic coupling and, for example, a lowering of the dielectric permittivity enhances the effect. An apparent charge reversal of the surface neutralized by the multivalent ion is always observed together with a repulsion at large separation, whereas at intermediate separations a repulsion can appear without charge reversal. The effect is hardly observable for a symmetric multivalent salt (e.g., 2:2 or 3:3).}},
author = {{Trulsson, Martin and Jönsson, Bo and Åkesson, Torbjörn and Forsman, Jan and Labbez, Christophe}},
issn = {{0743-7463}},
language = {{eng}},
number = {{23}},
pages = {{11562--11569}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Langmuir}},
title = {{Repulsion between oppositely charged macromolecules or particles}},
url = {{http://dx.doi.org/10.1021/la701222b}},
doi = {{10.1021/la701222b}},
volume = {{23}},
year = {{2007}},
}