Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Many-Body Force and Mobility Measurements in Colloidal Systems   We demonstrate a technique for simultaneously measuring each component of the
force vectors and mobility tensor of a small collection of colloidal particles
based on observing a set of particle trajectories. For a few-body system of
micron-sized polymer beads in oil separated by several particle radii, we find
that the mobility tensor is well-described by a pairwise Stokeslet model. This
stands in contrast to the electrostatic interactions, which were found to
deviate significantly from a pairwise model. The measurement technique
presented here should be simple to extend to systems of heterogeneous,
non-spherical particles arranged in arbitrary 3D geometries.

33
The categories of this paper are: plasm-ph
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
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
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph