Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Optofluidic control of the dispersion of nanoscale dumbbells   Previous research has shown that gold nanoparticles immersed in water in an
optical vortex lattice formed by the perpendicular intersection of two standing
light waves with a \pi/2 rad phase difference will experience enhanced
dispersion that scales with the intensity of the incident laser. We show that
flexible nanoscale dumbbells (created by attaching two such gold particles by
means of a polymer chain) in the same field display different types of motion
depending on the chain length and field intensity. We have not disregarded the
secondary optical forces due to light scattering. The dumbbells may disperse,
rotate or remain trapped. For some values of the parameters, the (enhanced)
dispersion possesses a displacement distribution with exponential tails, making
the motion anomalous, though Brownian.

23
The categories of this paper are: solv-int
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn
16
The categories of this paper are: stat
27
The categories of this paper are: comp-gas
7
The categories of this paper are: hep-th