Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structure and phase transitions into ionic adsorption layers on liquid
  interfaces   The structure of ionic adsorption layers is studied via a proper
thermodynamic treatment of the electrostatic and non-electrostatic interactions
between the surfactant ions as well as of the effect of thermodynamic
non-locality. The analysis is also applied to phase transitions into the ionic
adsorption layer, which interfere further with the oscillatory-diffusive
structure of the electric double layer and hydrodynamic stability of squeezing
waves in thin liquid films.

34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
19
The categories of this paper are: eess
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys