Open AccessEffect of polymeric nanoparticles on dielectric and electro-optical properties of ferroelectric liquid crystals
Author(s) -
Ajay Kumar,
Poonam Silotia,
A. M. Biradar
Publication year - 2010
Publication title -
journal of applied physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.699
H-Index - 319
eISSN - 1089-7550
pISSN - 0021-8979
DOI - 10.1063/1.3452355
Subject(s) - homeotropic alignment , rotational viscosity , ferroelectricity , anthracene , liquid crystal , materials science , dielectric , nanoparticle , indium tin oxide , molecule , copolymer , relaxation (psychology) , polarization (electrochemistry) , chemical engineering , nanotechnology , polymer , optoelectronics , chemistry , organic chemistry , composite material , thin film , engineering , psychology , social psychology
It has been observed that the polymeric nanoparticles, copolymer of polybenzene and anthracene (PBA NPs), can induce a homeotropic (HMT) alignment in various ferroelectric liquid crystal (FLC) mixtures. The HMT alignment of various FLCs is attributable to the fact that the anthracene molecules favor an upright orientation (with a little tilt) on the surfaces of indium tin oxide and this upright orientation of anthracene molecules works as a template to align FLC molecules homeotropically. It has been concluded that the addition of ∼ 0.5 wt % of PBA NPs is enough to induce a HMT alignment in a FLC material Felix 17/100. The influence of the PBA NPs concentrations on the transition temperature, physical constants (such as spontaneous polarization, rotational viscosity, and response time) and dielectric relaxation processes of FLC material (Felix 17/100) has also been investigated
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