Structure and Dynamics of Loosely Cross-Linked Ionic Microgel Dispersions in the Fluid Regime
Holmqvist, P. ; Mohanty, Priti LU ; Naegele, G. ; Schurtenberger, Peter LU
and Heinen, M.
(2012)
In Physical Review Letters
109(4).
- Abstract
- We report a comprehensive experimental-theoretical study of the temperature-and concentration-dependent swelling behavior of weakly cross-linked PNiPAm ionic microgel particles in the deionized fluid phase. The particles swell reversibly when the dispersion is cooled from the collapsed state to lower temperatures. While the collapsed state shows no dependence on the microgel number density, the swelling at lower T is more pronounced at lower concentrations. The static pair correlations and short-time diffusion functions, and the concentration and temperature dependence of the microgel radius and effective charge, are studied using static and dynamic light scattering in combination with state-of-the-art analytical theoretical schemes based... (More)
- We report a comprehensive experimental-theoretical study of the temperature-and concentration-dependent swelling behavior of weakly cross-linked PNiPAm ionic microgel particles in the deionized fluid phase. The particles swell reversibly when the dispersion is cooled from the collapsed state to lower temperatures. While the collapsed state shows no dependence on the microgel number density, the swelling at lower T is more pronounced at lower concentrations. The static pair correlations and short-time diffusion functions, and the concentration and temperature dependence of the microgel radius and effective charge, are studied using static and dynamic light scattering in combination with state-of-the-art analytical theoretical schemes based on a Yukawa-type effective pair potential and a core-shell model. We show that only such a combined, simultaneous fit of static and dynamic scattering functions allows for an unambiguous determination of the microgel radius and effective charge. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/3080004
- author
- Holmqvist, P.
; Mohanty, Priti
LU
; Naegele, G.
; Schurtenberger, Peter
LU
and Heinen, M.
- organization
- publishing date
- 2012
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Letters
- volume
- 109
- issue
- 4
- article number
- 048302
- publisher
- American Physical Society
- external identifiers
-
- wos:000306933000012
- scopus:84864239413
- pmid:23006114
- ISSN
- 1079-7114
- DOI
- 10.1103/PhysRevLett.109.048302
- language
- English
- LU publication?
- yes
- id
- 176a6fd4-942d-4bb5-bea8-6cabd7d39405 (old id 3080004)
- date added to LUP
- 2016-04-01 09:57:48
- date last changed
- 2022-01-25 18:26:43
@article{176a6fd4-942d-4bb5-bea8-6cabd7d39405,
abstract = {{We report a comprehensive experimental-theoretical study of the temperature-and concentration-dependent swelling behavior of weakly cross-linked PNiPAm ionic microgel particles in the deionized fluid phase. The particles swell reversibly when the dispersion is cooled from the collapsed state to lower temperatures. While the collapsed state shows no dependence on the microgel number density, the swelling at lower T is more pronounced at lower concentrations. The static pair correlations and short-time diffusion functions, and the concentration and temperature dependence of the microgel radius and effective charge, are studied using static and dynamic light scattering in combination with state-of-the-art analytical theoretical schemes based on a Yukawa-type effective pair potential and a core-shell model. We show that only such a combined, simultaneous fit of static and dynamic scattering functions allows for an unambiguous determination of the microgel radius and effective charge.}},
author = {{Holmqvist, P. and Mohanty, Priti and Naegele, G. and Schurtenberger, Peter and Heinen, M.}},
issn = {{1079-7114}},
language = {{eng}},
number = {{4}},
publisher = {{American Physical Society}},
series = {{Physical Review Letters}},
title = {{Structure and Dynamics of Loosely Cross-Linked Ionic Microgel Dispersions in the Fluid Regime}},
url = {{http://dx.doi.org/10.1103/PhysRevLett.109.048302}},
doi = {{10.1103/PhysRevLett.109.048302}},
volume = {{109}},
year = {{2012}},
}