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@ARTICLE{Hess:874181,
author = {Hess, Melissa and Roeben, Eric and Habicht, Axel and
Seiffert, Sebastian and Schmidt, Annette M.},
title = {{L}ocal dynamics in supramolecular polymer networks probed
by magnetic particle nanorheology},
journal = {Soft matter},
volume = {15},
number = {5},
issn = {1744-6848},
address = {London},
publisher = {Royal Soc. of Chemistry},
reportid = {FZJ-2020-01281},
pages = {842 - 850},
year = {2019},
abstract = {Transient supramolecular polymer networks are promising
candidates as soft self-healing or stimuli-sensitive
materials. In this paper, we employ a novel nanorheological
approach, magnetic particle nanorheology (MPN), in order to
better understand the local dynamic properties of model
supramolecular networks from a molecular point of view.
Hence, the bond strength between four-arm star-shaped
polyethylene glycol (PEG) functionalized at the four
extremities with terpyridine ligands is tuned by
implementing different metal ions with variable complexation
affinities for the ligand. We show that MNP allows for the
evaluation of the strength and connectivity of the polymer
networks by the estimation of relaxation times, mesh size,
and also the viscoelastic properties of these materials.
These results are compared and complemented to former
outcomes on these systems that were obtained by macroscopic
analytical methods. A clear dependence between the strength
of the metal–ligand complex and the local dynamics of the
polymeric network is observed by the nanorheological
approach, which is in good agreement with previous
predictions related to the complex formation constants.},
cin = {ICS-2 / IHRS-BioSoft},
ddc = {530},
cid = {I:(DE-Juel1)ICS-2-20110106 /
I:(DE-Juel1)IHRS-BioSoft-20161118},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551) /
IHRS-BioSoft - International Helmholtz Research School of
Biophysics and Soft Matter (IHRS-BioSoft-20061101)},
pid = {G:(DE-HGF)POF3-551 / G:(DE-Juel1)IHRS-BioSoft-20061101},
typ = {PUB:(DE-HGF)16},
pubmed = {pmid:30608500},
UT = {WOS:000457540000023},
doi = {10.1039/C8SM01802B},
url = {https://juser.fz-juelich.de/record/874181},
}