Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Colloidal aggregation in microgravity by critical Casimir forces   By using the critical Casimir force, we study the attractive strength
dependent aggregation of colloids with and without gravity by means of Near
Field scattering. Significant differences were seen between microgravity and
ground experiments, both in the structure of the formed fractal aggregates as
well as the kinetics of growth. Ground measurements are severely affected by
sedimentation resulting in reaction limited behavior. In microgravity, a purely
diffusive behavior is seen reflected both in the measured fractal dimensions
for the aggregates as well as the power law behavior in the rate of growth.
Formed aggregates become more open as the attractive strength increases.

6
The categories of this paper are: astro-ph
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
1
The categories of this paper are: cs
22
The categories of this paper are: chao-dyn
31
The categories of this paper are: ao-sci
24
The categories of this paper are: dg-ga
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int