Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The interaction of hybrid nanoparticles inserted within surfactant
  bilayers   We determine by small-angle x-ray scattering the structure factor of
hydrophobic particles inserted within lamellar surfactant phases for various
particle concentrations. The data are then analyzed by numerically solving the
Ornstein-Zernicke equation, taking into account both the intra- and interlayer
interactions. We find that particles within the same layer repel each other and
that the interaction potential (taken as independent of the concentration) has
a contact value of 2.2 k$_{\text{B}}$T and a range of about 10 {\AA}. If the
amplitude is allowed to decrease with increasing concentration, the contact
value in the dilute limit is about 5 k$_{\text{B}}$T for a similar range.

2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
1
The categories of this paper are: cs
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph