Abstract
Organic–inorganic composite based on liquid crystalline and TiO2 nanoparticles were obtained and investigated taking into account the crystallographic form of TiO2 i.e., anatase/rutile mixed phase. TiO2 is an important class of material having various dielectric and electro-optical properties. The existent research presents the electro-optical properties of nematic liquid crystal (NLC) E204 and TiO2 nanocomposites over an extensive range of frequencies. Various important display parameters such as response time, threshold voltage, pretilt angle and activation energy of pristine as well as TiO2 doped composites systems were measured and analyzed. In comparison with the pure, TiO2-doped composite systems has approximately 50% faster response time, owing to its remarkable decline in the relaxation time and activation energy of the LCs. The alteration in the optical intensity of the NLC composites as a function of the concentration of TiO2 nanoparticles (NPs) was also examined. It was established that the optical intensity in nano-nematic composites was decreasing with the concentration of TiO2 NPs. Also, it was observed that an escalation in the TiO2 NPs concentration in NLC composites indicates to an escalation in the birefringence. Probable mechanisms of the interactivity between NLC molecules and TiO2 NPs have been discussed. The current work shows that the TiO2 NPs doping has an encouraging application in the display devices, including other electro-optical as well as photonic applications.
Highlights
Liquid Crystals (LCs) are composed of moderate size organic molecules having properties between solids and liquids
These relaxation times are related with the molecular polarization rotation time around the short or long molecular axis of nematic liquid crystal (NLC) [47]
The influence of TiO2 NPs on E204 LCs was explored in the current article
Summary
Liquid Crystals (LCs) are composed of moderate size organic molecules having properties between solids and liquids. This is a strange form of matter which generated the curiosity in scientists of the previous century. They are extensively used in industries with wide range of applications which is still growing. The LCs in which phase transitions occur due to change in temperature are called thermotropic [1] Liquid crystalline materials, themselves being a blend of crystalline solids and isotropic liquids lead one into the heartland of interdisciplinary science where organic chemistry, physics and material science meet. Nematic phase of liquid crystals has bagged ample focus because of its widespread scope both in Bhupendra Pratap Singh et al.: Enhanced Electro-optical Properties of Low Viscous Nematic Liquid Crystal Doped with
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