1 research outputs found
Continuous Isotropic-Nematic transition in compressed rod-like based nanocolloid
Landau - de Gennes mean field model predicts the discontinuous transition for
the Isotropic - Nematic transition, associated with uniaxial and quadrupolar
order parameter in three dimensions. This report shows pressure-related
dielectric studies for rod-like nematogenic pentylcyanobiphenyl (5CB) and its
nanocolloids with BaTiO3 nanoparticles. The scan of dielectric constant
revealed the continuous I-N transition in a compressed nanocolloid with a tiny
amount of nanoparticles (x=0.1%). For the nematic phase in 5CB and its x=1%
nanocolloid the enormous values of dielectric constant and the bending-type
long-range pretransitional behavior were detected. The 'shaping' influence of
pretransitional fluctuations was also detected for the ionic-related
contribution to dielectric permittivity in the isotropic phase. For the
high-frequency relaxation domain, this impact was tested for the primary
relaxation time and the translational-orientaional decoupling.Comment: 28 pages, 7 figure