Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Microstructural understanding of the length and stiffness dependent
  shear thinning in semi-dilute colloidal rods   Complex fluids containing low concentrations of slender colloidal rods can
display a high viscosity, while little flow is needed to thin the fluid. This
feature makes slender rods essential constituents in industrial applications
and biology. Though this behaviour strongly depends on the rod-length, so far
no direct relation could be identified. We employ a library of filamentous
viruses to study the effect of rod size and flexibility on the zero-shear
viscosity and shear-thinning behaviour. Rheology and small angle neutron
scattering data are compared to a revised version of the standard theory for
ideally stiff rods, which incorporates a complete shear-induced dilation of the
confinement. While the earlier predicted length-independent pre-factor of the
restricted rotational diffusion coefficient is confirmed by varying the length
and concentration of the rods, the revised theory correctly predicts the shear
thinning behaviour as well as the underlying orientational order. These results
can be directly applied to understand the manifold systems based on rod-like
colloids and design new materials.

7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex