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Jamming and overpacking fuzzy microgels: Deformation, interpenetration, and compression

Conley, Gaurasundar M.; Aebischer, Philippe; Nöjd, Sofi LU ; Schurtenberger, Peter LU and Scheffold, Frank (2017) In Science advances 3(10). p.1700969-1700969
Abstract
Tuning the solubility of fuzzy polymer microgels by external triggers, such as temperature or pH, provides a unique mechanism for controlling the porosity and size of colloidal particles on the nanoscale. As a consequence, these smart microgel particles are being considered for applications ranging from viscosity modifiers and sensing to drug delivery and as models for the glass and the jamming transition. Despite their widespread use, little is known about how these soft particles adapt their shape and size under strong mechanical compression. We use a combination of precise labeling protocols and two-color superresolution microscopy to unravel the behavior of tracer microgels inside densely packed soft solids. We find that... (More)
Tuning the solubility of fuzzy polymer microgels by external triggers, such as temperature or pH, provides a unique mechanism for controlling the porosity and size of colloidal particles on the nanoscale. As a consequence, these smart microgel particles are being considered for applications ranging from viscosity modifiers and sensing to drug delivery and as models for the glass and the jamming transition. Despite their widespread use, little is known about how these soft particles adapt their shape and size under strong mechanical compression. We use a combination of precise labeling protocols and two-color superresolution microscopy to unravel the behavior of tracer microgels inside densely packed soft solids. We find that interpenetration and shape deformation are dominant until, in the highly overpacked state, this mechanism saturates and the only remaining way to further densify the system is by isotropic compression. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Science advances
volume
3
issue
10
pages
1700969 - 1700969
publisher
American Association for the Advancement of Science (AAAS)
external identifiers
  • wos:000417998700018
ISSN
2375-2548
DOI
10.1126/sciadv.1700969
language
English
LU publication?
yes
id
ed2967bb-0295-4095-9b56-9c296aa9eedc
date added to LUP
2017-11-28 11:39:20
date last changed
2018-01-16 13:26:42
@article{ed2967bb-0295-4095-9b56-9c296aa9eedc,
  abstract     = {Tuning the solubility of fuzzy polymer microgels by external triggers, such as temperature or pH, provides a unique mechanism for controlling the porosity and size of colloidal particles on the nanoscale. As a consequence, these smart microgel particles are being considered for applications ranging from viscosity modifiers and sensing to drug delivery and as models for the glass and the jamming transition. Despite their widespread use, little is known about how these soft particles adapt their shape and size under strong mechanical compression. We use a combination of precise labeling protocols and two-color superresolution microscopy to unravel the behavior of tracer microgels inside densely packed soft solids. We find that interpenetration and shape deformation are dominant until, in the highly overpacked state, this mechanism saturates and the only remaining way to further densify the system is by isotropic compression.},
  author       = {Conley, Gaurasundar M. and Aebischer, Philippe and Nöjd, Sofi and Schurtenberger, Peter and Scheffold, Frank},
  issn         = {2375-2548},
  language     = {eng},
  month        = {10},
  number       = {10},
  pages        = {1700969--1700969},
  publisher    = {American Association for the Advancement of Science (AAAS)},
  series       = {Science advances},
  title        = {Jamming and overpacking fuzzy microgels: Deformation, interpenetration, and compression},
  url          = {http://dx.doi.org/10.1126/sciadv.1700969},
  volume       = {3},
  year         = {2017},
}