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Steering patchy particles using multivalent electrolytes

Abrikossov, Alexei LU ; Stenqvist, Björn LU and Lund, Mikael LU (2017) In Soft Matter 13(26). p.4591-4597
Abstract

Proteins and many recently designed colloids can be regarded as patchy particles where directional interactions strongly influence and govern assembly behavior. Using explicit ion implicit solvent Metropolis Monte Carlo simulations, we investigate spherical model particles, carrying both charge and electric patches, in dilute aqueous 1 : 1, 1 : 3, and 3 : 1 electrolyte solutions. Striking differences in pair interaction free energies and orientational correlations are induced by three different salts which are discussed and rationalized in terms of ion-binding to surface groups, ion-ion correlations, and double layer forces. These findings suggest a general strategy where directional, intermolecular interactions can be invoked and tuned... (More)

Proteins and many recently designed colloids can be regarded as patchy particles where directional interactions strongly influence and govern assembly behavior. Using explicit ion implicit solvent Metropolis Monte Carlo simulations, we investigate spherical model particles, carrying both charge and electric patches, in dilute aqueous 1 : 1, 1 : 3, and 3 : 1 electrolyte solutions. Striking differences in pair interaction free energies and orientational correlations are induced by three different salts which are discussed and rationalized in terms of ion-binding to surface groups, ion-ion correlations, and double layer forces. These findings suggest a general strategy where directional, intermolecular interactions can be invoked and tuned via small amounts of a carefully chosen electrolyte.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Soft Matter
volume
13
issue
26
pages
7 pages
publisher
Royal Society of Chemistry
external identifiers
  • scopus:85022047798
  • wos:000411436600005
ISSN
1744-683X
DOI
10.1039/c7sm00470b
language
English
LU publication?
yes
id
dde11325-55ce-4396-8be0-bd7f3f03daa5
date added to LUP
2017-07-24 13:35:34
date last changed
2018-01-16 13:21:43
@article{dde11325-55ce-4396-8be0-bd7f3f03daa5,
  abstract     = {<p>Proteins and many recently designed colloids can be regarded as patchy particles where directional interactions strongly influence and govern assembly behavior. Using explicit ion implicit solvent Metropolis Monte Carlo simulations, we investigate spherical model particles, carrying both charge and electric patches, in dilute aqueous 1 : 1, 1 : 3, and 3 : 1 electrolyte solutions. Striking differences in pair interaction free energies and orientational correlations are induced by three different salts which are discussed and rationalized in terms of ion-binding to surface groups, ion-ion correlations, and double layer forces. These findings suggest a general strategy where directional, intermolecular interactions can be invoked and tuned via small amounts of a carefully chosen electrolyte.</p>},
  author       = {Abrikossov, Alexei and Stenqvist, Björn and Lund, Mikael},
  issn         = {1744-683X},
  language     = {eng},
  number       = {26},
  pages        = {4591--4597},
  publisher    = {Royal Society of Chemistry},
  series       = {Soft Matter},
  title        = {Steering patchy particles using multivalent electrolytes},
  url          = {http://dx.doi.org/10.1039/c7sm00470b},
  volume       = {13},
  year         = {2017},
}