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@ARTICLE{Westermeier:825139,
author = {Westermeier, Fabian and Pennicard, David and Hirsemann,
Helmut and Wagner, Ulrich H. and Rau, Christoph and
Graafsma, Heinz and Schall, Peter and Lettinga, M.P. and
Struth, Bernd},
title = {{C}onnecting structure, dynamics and viscosity in sheared
soft colloidal liquids: a medley of anisotropic
fluctuations},
journal = {Soft matter},
volume = {12},
number = {1},
issn = {1744-6848},
address = {London},
publisher = {Royal Soc. of Chemistry},
reportid = {FZJ-2016-07616},
pages = {171 - 180},
year = {2016},
abstract = {Structural distortion and relaxation are central to any
liquid flow. Their full understanding requiressimultaneous
probing of the mechanical as well as structural and
dynamical response. We provide thefirst full dynamical
measurement of the transient structure using combined
coherent X-ray scatteringand rheology on electrostatically
interacting colloidal fluids. We find a stress overshoot
during the start-upof shear which is due to the strong
anisotropic overstretching and compression of
nearest-neighbordistances. The rheological response is
reflected in uncorrelated entropy-driven intensity
fluctuations.While the structural distortion under steady
shear is well described by Smoluchowski theory, we find
anincrease of the particle dynamics beyond the trivial
contribution of flow. After the cessation of shear, thefull
fluid microstructure and dynamics are restored, both on the
structural relaxation timescale. We thusfind unique
structure-dynamics relations in liquid flow, responsible for
the macroscopic rheologicalbehavior of the system.},
cin = {ICS-3},
ddc = {530},
cid = {I:(DE-Juel1)ICS-3-20110106},
pnm = {551 - Functional Macromolecules and Complexes (POF3-551)},
pid = {G:(DE-HGF)POF3-551},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000366863800021},
doi = {10.1039/C5SM01707F},
url = {https://juser.fz-juelich.de/record/825139},
}