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Simulations of latex particles immersed in dendrimer solutions.

Trulsson, Martin LU ; Forsman, Jan LU ; Åkesson, Torbjörn LU and Jönsson, Bo LU (2009) In Langmuir 25(11). p.6106-6112
Abstract
In this work, we present Monte Carlo simulations of mixtures containing negatively charged latex particles and positively charged dendrimers. We focus on the interaction between two latex particles as salt concentration, dendrimer dose, and generation number are varied. Interaction free energies and corresponding stability ratios are calculated. Minimal stability is found near the isoelectric point, i.e., where the amount of adsorbed dendrimer charge matches the charge of the latex particles. Away from the isoelectric point, the stability increases as the latex particles get more and more under- or overcompensated, an increase that is more steep on the overcompensated side. Increasing the dendrimer generation leads to a more "patchy"... (More)
In this work, we present Monte Carlo simulations of mixtures containing negatively charged latex particles and positively charged dendrimers. We focus on the interaction between two latex particles as salt concentration, dendrimer dose, and generation number are varied. Interaction free energies and corresponding stability ratios are calculated. Minimal stability is found near the isoelectric point, i.e., where the amount of adsorbed dendrimer charge matches the charge of the latex particles. Away from the isoelectric point, the stability increases as the latex particles get more and more under- or overcompensated, an increase that is more steep on the overcompensated side. Increasing the dendrimer generation leads to a more "patchy" surface. This heterogeneity is particularly relevant close to the isoelectric point. Given the relative simplicity of the model, the simulation results are in surprisingly good agreement with the experimental data. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Langmuir
volume
25
issue
11
pages
6106 - 6112
publisher
The American Chemical Society
external identifiers
  • wos:000266604000019
  • pmid:19466775
  • scopus:66749146672
ISSN
0743-7463
DOI
10.1021/la900102r
language
English
LU publication?
yes
id
ba4d5d86-c670-436c-abec-77515e5f99a2 (old id 1412044)
date added to LUP
2009-06-11 08:58:10
date last changed
2017-01-01 05:18:23
@article{ba4d5d86-c670-436c-abec-77515e5f99a2,
  abstract     = {In this work, we present Monte Carlo simulations of mixtures containing negatively charged latex particles and positively charged dendrimers. We focus on the interaction between two latex particles as salt concentration, dendrimer dose, and generation number are varied. Interaction free energies and corresponding stability ratios are calculated. Minimal stability is found near the isoelectric point, i.e., where the amount of adsorbed dendrimer charge matches the charge of the latex particles. Away from the isoelectric point, the stability increases as the latex particles get more and more under- or overcompensated, an increase that is more steep on the overcompensated side. Increasing the dendrimer generation leads to a more "patchy" surface. This heterogeneity is particularly relevant close to the isoelectric point. Given the relative simplicity of the model, the simulation results are in surprisingly good agreement with the experimental data.},
  author       = {Trulsson, Martin and Forsman, Jan and Åkesson, Torbjörn and Jönsson, Bo},
  issn         = {0743-7463},
  language     = {eng},
  number       = {11},
  pages        = {6106--6112},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {Simulations of latex particles immersed in dendrimer solutions.},
  url          = {http://dx.doi.org/10.1021/la900102r},
  volume       = {25},
  year         = {2009},
}