Single Step Hybrid Coating Process to Enhance the Electrosteric Stabilization of Inorganic Particles
Rufier, Chantal ; Reufer, Mathias ; Dietsch, Herve and Schurtenberger, Peter LU
(2011)
In Langmuir
27(11).
p.6622-6627
- Abstract
- We report on a single-step coating process and the resulting colloidal stability of silica-coated spindle-type hematite nanoparticles (NPs) decorated with a layer of poly-(acrylic acid) (PAA) polyelectrolyte chains that are partially incorporated into the silica shell. The stability of PAA coated NPs as a function of pH and salt concentration in water was compared to bare hematite particles and simple silica-coated hematite NPs, studying their electrophoretic mobility and the hydrodynamic radius by dynamic light scattering. Particles coated with this method were found to be more stable upon the addition of salt at pH 7, and their aggregation at the pH of the isoelectric point is reversible. The hybrid coating appears to increase the... (More)
- We report on a single-step coating process and the resulting colloidal stability of silica-coated spindle-type hematite nanoparticles (NPs) decorated with a layer of poly-(acrylic acid) (PAA) polyelectrolyte chains that are partially incorporated into the silica shell. The stability of PAA coated NPs as a function of pH and salt concentration in water was compared to bare hematite particles and simple silica-coated hematite NPs, studying their electrophoretic mobility and the hydrodynamic radius by dynamic light scattering. Particles coated with this method were found to be more stable upon the addition of salt at pH 7, and their aggregation at the pH of the isoelectric point is reversible. The hybrid coating appears to increase the colloidal stability in aqueous media due to the combination of the decrease of the isoelectric point and the electrosteric stabilization. This coating method is not limited to hematite particles but can easily be adapted to any silica-coatable particle. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1985876
- author
- Rufier, Chantal
; Reufer, Mathias
; Dietsch, Herve
and Schurtenberger, Peter
LU
- organization
- publishing date
- 2011
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Langmuir
- volume
- 27
- issue
- 11
- pages
- 6622 - 6627
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- wos:000290978100011
- scopus:79958005525
- pmid:21528867
- ISSN
- 0743-7463
- DOI
- 10.1021/la200525u
- language
- English
- LU publication?
- yes
- id
- e048e5cf-e6f1-4d39-9dc9-650eaa58c2f7 (old id 1985876)
- date added to LUP
- 2016-04-01 10:06:17
- date last changed
- 2025-04-04 14:45:30
@article{e048e5cf-e6f1-4d39-9dc9-650eaa58c2f7,
abstract = {{We report on a single-step coating process and the resulting colloidal stability of silica-coated spindle-type hematite nanoparticles (NPs) decorated with a layer of poly-(acrylic acid) (PAA) polyelectrolyte chains that are partially incorporated into the silica shell. The stability of PAA coated NPs as a function of pH and salt concentration in water was compared to bare hematite particles and simple silica-coated hematite NPs, studying their electrophoretic mobility and the hydrodynamic radius by dynamic light scattering. Particles coated with this method were found to be more stable upon the addition of salt at pH 7, and their aggregation at the pH of the isoelectric point is reversible. The hybrid coating appears to increase the colloidal stability in aqueous media due to the combination of the decrease of the isoelectric point and the electrosteric stabilization. This coating method is not limited to hematite particles but can easily be adapted to any silica-coatable particle.}},
author = {{Rufier, Chantal and Reufer, Mathias and Dietsch, Herve and Schurtenberger, Peter}},
issn = {{0743-7463}},
language = {{eng}},
number = {{11}},
pages = {{6622--6627}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Langmuir}},
title = {{Single Step Hybrid Coating Process to Enhance the Electrosteric Stabilization of Inorganic Particles}},
url = {{http://dx.doi.org/10.1021/la200525u}},
doi = {{10.1021/la200525u}},
volume = {{27}},
year = {{2011}},
}