Morphological and Dielectric Behaviour of Dye Dispersed Ferroelectric Liquid Crystal Composite Films

Abstract

The dielectric spectroscopy and electrooptic response of the ferroelectric liquid crystal mixture SCE9 doped with different concentrations of antraquinone dye upto 2.0 wt% has been studied in the frequency range 50Hz-1MHz.Our finding shows that with the dispersion of dye molecules,the SmC*-SmA transition temperature shift to lower side.The permittivity increases up to 1.0wt% concentration of dye and then depleated at higher concentration.The effect of dye addition on different parameters such as Goldstone mode relaxation frequency,spontaneous polarisation and rotational viscosity have also been discussed