Effect of activation energy on the mobility of free charge carriers in liquid crystals' reentrant nematic and smectic phases of liquid crystals

Abstract

The optical and thermal properties of binary mixtures of 4′-Octyloxy-4-biphenylcarbonitrile (8OCB) and 4-hexyl-4-biphenylcarbonitrile (6CB) materials under optical phase transition studies show that when the specimen cooled from its isotropic melt for the specified concentrations at different temperatures, respectively, re-entrant nematic and re-entrant smectic-A phases appeared sequentially. There has been discussion of electrical conductivity, activation energy, and charge carry mobility of re-entrant phases.