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@ARTICLE{Korculanin:827366,
author = {Korculanin, Olivera and Hermida-Merino, D. and Hirsemann, H
and Struth, B. and Rogers, S. A. and Lettinga, M.P.},
title = {{A}namalous structual response of nematic colloidal
platelets subjected to large amplitude stress oscillations},
journal = {Physics of fluids},
volume = {29},
issn = {0031-9171},
address = {Melville, NY},
publisher = {American Institute of Physics},
reportid = {FZJ-2017-01502},
pages = {023102},
year = {2017},
abstract = {Time-resolved small angle X-ray measurements are used to
investigate the dynamic response to nonlinear oscillatory
stresses and strains of a nematic dispersion of colloidal
gibbsite platelets. We track the full 3D rotational motion
of the director by employing plate-plate and concentric
cylinder Couette geometries as well as a vertical X-ray
beam. Under nonlinear oscillatory stress, we observe strong
offsets in the rheological response as well as asymmetrical
behavior in the microscopic structural response. This offset
and asymmetry are connected to the yielding behavior of the
platelets. By increasing the stress amplitude, we observed
that the offset of the rheological response diminishes and
the microscopic response becomes more symmetric; however,
this strongly depends on the frequency of the stress input,
and hence the time necessary for the system to yield.I.
INTRODUCTI},
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:000395902000029},
doi = {10.1063/1.4975605},
url = {https://juser.fz-juelich.de/record/827366},
}