Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Studies on binary mixtures of nematic liquid crystals made of strongly
  polar molecules with identical cores and antagonistic orientation of
  permanent dipoles   We report experimental studies on optical (birefringence, $\Delta n$),
dielectric $(\Delta \varepsilon)$ and bend-splay elastic anisotropies ($\Delta
K=K_{33}-K_{11})$ of a few mixtures of two nematic liquid crystals, namely
CCH-7 and CCN-47, made of highly polar molecules with identical cores and
antagonistic orientation of permanent dipoles. In particular, the polar group
(-CN) attached to the bicyclohexane core of CCH-7 is oriented along the
longitudinal direction whereas, in CCN-47, it is oriented along the transverse
direction. We show that apart from the significant contribution to the optical
and dielectric anisotropies, the antagonistic orientation of strongly polar
groups plays a crucial role in determining the bend-splay elastic anisotropy.
The elastic properties are explained based on a model proposed by Priest,
considering the effect of intermolecular association and the resulting
length-to-width ratio of the molecules.

30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex