Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Empty liquid state and re-entrant phase behavior of the patchy colloids
  confined in the porous media   Patchy colloidal model with three and four equivalent patches, confined in
the attractive random porous media, undergo re-entrant gas-liquid phase
separation with the possibility for the liquid phase density to approach zero.
This unusual behavior is caused by an interplay between strong fluid-fluid
bonding interactions and weak fluid-matrix attractions. At high temperature the
shape of the phase diagram is determined by the attractive interaction between
the fluid particles; weak Yukawa attraction between fluid and obstacles only
slightly enhances the fluid-fluid bonding. At low enough temperature the
network of the fluid particles is formed and the shape of the phase diagram
becomes defined by the Yukawa fluid-obstacle attraction. Due to this
interaction a layer of mutually bonded particles around the obstacles is formed
and the network becomes fluid particles in the network is defined by a spatial
arrangement of the matrix particles. These features may open a new
possibilities in making the equilibrium gels with the predefined nonuniform
distribution of the particles.

12
The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph