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Small-Angle Neutron Scattering on a Core-Shell Colloidal System: A Contrast Variation Study

Zackrisson Oskolkova, Malin LU ; Stradner, Anna LU ; Schurtenberger, Peter LU and Bergenholtz, Johan (2005) In Langmuir 21(23). p.10835-10845
Abstract
Small-angle neutron scattering (SANS) measurements are reported on a sterically stabilized, coreshell

colloidal system using contrast variation. Aqueous dispersions of polystyrene particles bearing grafted

poly(ethylene glycol) (PEG) have been studied over a large range of particle concentrations and two different

solvent conditions for the PEG polymer. SANS data are analyzed quantitatively by modeling the particles

as core-shell colloids. In a good solvent and under particle contrast conditions, an effective hard-sphere

interaction captures excluded-volume interactions up to high concentrations. Contrast variation, through

isotopic substitution of both the core and solvent, expedite a... (More)
Small-angle neutron scattering (SANS) measurements are reported on a sterically stabilized, coreshell

colloidal system using contrast variation. Aqueous dispersions of polystyrene particles bearing grafted

poly(ethylene glycol) (PEG) have been studied over a large range of particle concentrations and two different

solvent conditions for the PEG polymer. SANS data are analyzed quantitatively by modeling the particles

as core-shell colloids. In a good solvent and under particle contrast conditions, an effective hard-sphere

interaction captures excluded-volume interactions up to high concentrations. Contrast variation, through

isotopic substitution of both the core and solvent, expedite a detailed study of the PEG layer, both in the

dilute limit and as a function of the particle concentration. Upon diminishing the solvent quality, subtle

changes in the PEG layer translate into attractions among particles of moderate magnitude (Less)
Please use this url to cite or link to this publication:
author
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Small-angle neutron scattering, core-shell particles, contrast-variation, PEG layer, grafted
in
Langmuir
volume
21
issue
23
pages
10835 - 10845
publisher
The American Chemical Society
external identifiers
  • scopus:28044444322
ISSN
0743-7463
DOI
10.1021/la051664v
language
English
LU publication?
no
id
52acab03-8952-41ba-92d0-d177aa8cf2d1 (old id 3363713)
date added to LUP
2013-01-23 12:56:45
date last changed
2017-10-01 03:48:24
@article{52acab03-8952-41ba-92d0-d177aa8cf2d1,
  abstract     = {Small-angle neutron scattering (SANS) measurements are reported on a sterically stabilized, coreshell<br/><br>
colloidal system using contrast variation. Aqueous dispersions of polystyrene particles bearing grafted<br/><br>
poly(ethylene glycol) (PEG) have been studied over a large range of particle concentrations and two different<br/><br>
solvent conditions for the PEG polymer. SANS data are analyzed quantitatively by modeling the particles<br/><br>
as core-shell colloids. In a good solvent and under particle contrast conditions, an effective hard-sphere<br/><br>
interaction captures excluded-volume interactions up to high concentrations. Contrast variation, through<br/><br>
isotopic substitution of both the core and solvent, expedite a detailed study of the PEG layer, both in the<br/><br>
dilute limit and as a function of the particle concentration. Upon diminishing the solvent quality, subtle<br/><br>
changes in the PEG layer translate into attractions among particles of moderate magnitude},
  author       = {Zackrisson Oskolkova, Malin and Stradner, Anna and Schurtenberger, Peter and Bergenholtz, Johan},
  issn         = {0743-7463},
  keyword      = {Small-angle neutron scattering,core-shell particles,contrast-variation,PEG layer,grafted},
  language     = {eng},
  number       = {23},
  pages        = {10835--10845},
  publisher    = {The American Chemical Society},
  series       = {Langmuir},
  title        = {Small-Angle Neutron Scattering on a Core-Shell Colloidal System: A Contrast Variation Study},
  url          = {http://dx.doi.org/10.1021/la051664v},
  volume       = {21},
  year         = {2005},
}