A new look at effective interactions between microgel particles
Bergman, Maxime J. LU ; Gnan, Nicoletta ; Obiols-rabasa, Marc LU ; Meijer, Janne-mieke LU ; Rovigatti, Lorenzo ; Zaccarelli, Emanuela and Schurtenberger, Peter LU
(2018)
In Nature Communications
9(5039).
- Abstract
- Thermoresponsive microgels find widespread use as colloidal model systems, because their temperature-dependent size allows facile tuning of their volume fraction in situ. However, an interaction potential unifying their behavior across the entire phase diagram is sorely lacking. Here we investigate microgel suspensions in the fluid regime at different volume fractions and temperatures, and in the presence of another population of small microgels, combining confocal microscopy experiments and numerical simulations. We find that effective interactions between microgels are clearly temperature dependent. In addition, microgel mixtures possess an enhanced stability compared to hard colloid mixtures - a property not predicted by a simple... (More)
- Thermoresponsive microgels find widespread use as colloidal model systems, because their temperature-dependent size allows facile tuning of their volume fraction in situ. However, an interaction potential unifying their behavior across the entire phase diagram is sorely lacking. Here we investigate microgel suspensions in the fluid regime at different volume fractions and temperatures, and in the presence of another population of small microgels, combining confocal microscopy experiments and numerical simulations. We find that effective interactions between microgels are clearly temperature dependent. In addition, microgel mixtures possess an enhanced stability compared to hard colloid mixtures - a property not predicted by a simple Hertzian model. Based on numerical calculations we propose a multi-Hertzian model, which reproduces the experimental behavior for all studied conditions. Our findings highlight that effective interactions between microgels are much more complex than usually assumed, displaying a crucial dependence on temperature and on the internal core-corona architecture of the particles. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/0b185e0f-6ac2-4817-9f8f-cfabe2055019
- author
- Bergman, Maxime J.
LU
; Gnan, Nicoletta
; Obiols-rabasa, Marc
LU
; Meijer, Janne-mieke
LU
; Rovigatti, Lorenzo
; Zaccarelli, Emanuela
and Schurtenberger, Peter
LU
- organization
- publishing date
- 2018-11-28
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Nature Communications
- volume
- 9
- issue
- 5039
- pages
- 11 pages
- publisher
- Nature Publishing Group
- external identifiers
-
- pmid:30487527
- scopus:85057539488
- ISSN
- 2041-1723
- DOI
- 10.1038/s41467-018-07332-5
- language
- English
- LU publication?
- yes
- id
- 0b185e0f-6ac2-4817-9f8f-cfabe2055019
- date added to LUP
- 2018-12-08 14:43:01
- date last changed
- 2023-11-18 07:42:45
@article{0b185e0f-6ac2-4817-9f8f-cfabe2055019,
abstract = {{Thermoresponsive microgels find widespread use as colloidal model systems, because their temperature-dependent size allows facile tuning of their volume fraction in situ. However, an interaction potential unifying their behavior across the entire phase diagram is sorely lacking. Here we investigate microgel suspensions in the fluid regime at different volume fractions and temperatures, and in the presence of another population of small microgels, combining confocal microscopy experiments and numerical simulations. We find that effective interactions between microgels are clearly temperature dependent. In addition, microgel mixtures possess an enhanced stability compared to hard colloid mixtures - a property not predicted by a simple Hertzian model. Based on numerical calculations we propose a multi-Hertzian model, which reproduces the experimental behavior for all studied conditions. Our findings highlight that effective interactions between microgels are much more complex than usually assumed, displaying a crucial dependence on temperature and on the internal core-corona architecture of the particles.}},
author = {{Bergman, Maxime J. and Gnan, Nicoletta and Obiols-rabasa, Marc and Meijer, Janne-mieke and Rovigatti, Lorenzo and Zaccarelli, Emanuela and Schurtenberger, Peter}},
issn = {{2041-1723}},
language = {{eng}},
month = {{11}},
number = {{5039}},
publisher = {{Nature Publishing Group}},
series = {{Nature Communications}},
title = {{A new look at effective interactions between microgel particles}},
url = {{http://dx.doi.org/10.1038/s41467-018-07332-5}},
doi = {{10.1038/s41467-018-07332-5}},
volume = {{9}},
year = {{2018}},
}