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We study a quantum-dots (QDs) dispersed bent core liquid crystalline systemin planar geometry and present experimental measurements of the orderparameter, dielectric dispersion and absorption spectra, optical textures, withattention to variations with temperature. A bent core liquid crystal (LC)14-2M-CH$_3$ is used as the host material and CdSe/ZnS core-shell type QDs areused as the dopant. The nematic (N) phase exhibited by the pristine (undoped)LC 14-2M-CH$_3$ contains cybotactic clusters, which are retained by its QDsincorporated LC nanocomposite. Our notable findings concern the reduction ofthe orientational order parameter of the QDs dispersed LC system compared toits pristine counterpart, at fixed temperatures, and a reduction of the size ofthe cybotactic clusters due to the incorporation of QDs. The reduced orderparameter for the doped system is accompanied by reduced birefringence,increased activation energy and a qualitative reduction in the dielectricanisotropy. We complement the experiments with a novel Landau-de Gennes typefree energy for a doped bent core LC system, that qualitatively captures thedoping-induced reduced order parameter and its variation with temperature. Thedependency of the mean order parameter on several other factors (e.g. clustersize, coupling parameter) are also analyzed.

Quantum-Dots Dispersed Bent-core Nematic Liquid Crystals and Cybotactic Clusters: Experimental and Theoretical Insights