Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: 3D rotational diffusion microrheology using 2D video microscopy   We propose a simple way to perform three-dimensional (3D) rotational
microrheology using two-dimensional (2D) video microscopy. The 3D rotational
brownian motion of micrometric wires in a viscous fluid is deduced from their
projection on the focal plane of an optical microscope objective. The
rotational diffusion coefficient of the wires of length between 1-100 \mu m is
extracted, as well as their diameter distribution in good agreement with
electron microscopy measurements. This is a promising way to characterize soft
visco-elastic materials, and probe the dimensions of anisotropic objects.

31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th