Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Electrostatic interaction between dissimilar colloids at fluid
  interfaces   The electrostatic interaction between two non-identical, moderately charged
colloids situated in close proximity of each other at a fluid interface is
studied. By resorting to a well-justified model system, this problem is
analytically solved within the framework of linearized Poisson-Boltzmann (PB)
density functional theory (DFT). The resulting interaction comprises a surface
and a line part, both of which, as functions of the inter-particle separation,
show a rich behavior including monotonic as well as non-monotonic variations.
In almost all cases, these variations cannot be captured correctly by using the
superposition approximation. Moreover, expressions for the surface tensions,
the line tensions and the fluid-fluid interfacial tension, which are all
independent of the inter-particle separation, are obtained. Our results are
expected to be particularly useful for emulsions stabilized by oppositely
charged particles.

10
The categories of this paper are: q-bio
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th