% IMPORTANT: The following is UTF-8 encoded. This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.
@ARTICLE{Parisi:908050,
author = {Parisi, D. and Vlassopoulos, D. and Kriegs, H. and Dhont,
J. K. G. and Kang, K.},
title = {{U}nderlying mechanism of shear-banding in soft glasses of
charged colloidal rods with orientational domains},
journal = {Journal of rheology},
volume = {66},
number = {2},
issn = {0148-6055},
address = {Melville, NY [u.a.]},
publisher = {Inst.},
reportid = {FZJ-2022-02347},
pages = {365 - 373},
year = {2022},
abstract = {Soft glasses of colloidal rods (fd-virus particles) with
orientational domains were recently shown to exhibit
inhomogeneous flow profiles [Dhont et al., Phys. Rev. Fluids
2, 043301 (2017)]: fracture and accompanied plug flow at
small shear rates, which transits to gradient shear-banding
on increasing the shear rate, while a uniform flow profile
develops at sufficiently high shear rates. These flow
profiles coexist with Taylor-vorticity bands. The texture of
such glasses under flow conditions consists of domains with
varying orientations. The observed gradient shear-banding
was solely attributed to the strong shear thinning behavior
of the material inside the domains (henceforth abbreviated
as domain-interior), without considering the texture stress
that is due to interactions between the glassy domains.
Here, we present new experiments on the shear-banding
transition to assess the role played by the texture stress
in comparison to the domain-interior stress. For a large
concentration, well into the glassy state, it is found that
both texture stress and domain-interior stress contribute
significantly to the gradient shear-banding transition in
the shear-rate region where it occurs. On the other hand,
for a small concentration close to the glass-transition
concentration, the domains are shown to coalesce within the
shear-rate range where gradient shear-banding is observed.
As a result, the texture stress diminishes and the
domain-interior stress increases upon coalescence, leading
to a stress plateau. Thus, a subtle interplay exists between
the stresses arising from the structural order on two widely
separated length scales from interactions between domains
and from the rod-rod interactions within the domain-interior
for both concentrations.I. INTRODUCTION},
cin = {IBI-4},
ddc = {530},
cid = {I:(DE-Juel1)IBI-4-20200312},
pnm = {5241 - Molecular Information Processing in Cellular Systems
(POF4-524)},
pid = {G:(DE-HGF)POF4-5241},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000761448700001},
doi = {10.1122/8.0000400},
url = {https://juser.fz-juelich.de/record/908050},
}