From the last three decades, there is sufficient research has been thru by the various research groups on the electro-optical and dielectric properties of liquid crystals (LCs) in homogeneously and vertically aligned liquid crystal (LC) systems. The current knowledge on the given research field is described that majority of the research is focused on the dispersed LC systems using different type of nanoscale particles such as nanoparticles (NPs), quantum dots (QDs) and nanorods (NRs) to study their effect on electro-optical, dielectric and conductivity performances of homogeneous and vertical LC cells. The existing research stated the role of various type of metal and metal oxide (Au, Ag, Pt, Si, TiO2, NiO, Fe2O3, diamond, etc.) NPs dispersed in nematic LCs. Thus, NPs dispersed LC composites have gained thought-provoking scientific and technological interest, mainly because the incorporation of NPs enhances the electro-optical and dielectric properties of the LCs. From the existing reports, preliminary results are found suitable but still the uniform dispersion, deposition, self-assembly; size and optimal concentration of NPs in LCs are exciting area of research to understand the detailed mechanism of interaction between LCs and nanostructures. In addition, there is the wide scope of research work to study the detailed dielectric behaviour of the vertically aligned LCs induced using contact (polyimide coated substrates) and non-contact (self-assembled NPs deposited substrates) methods with the negative dielectric anisotropy LCs. Thus, proposed work will be mapped with a suitable combination of LC, nanomaterials, LC orientations and cell configurations to obtain a superior performance of LC based display devices. The purpose of this research is to develop energy efficient cum high contrast flexible LC displays using non-contact method. Specifically, the performance characteristics of vertically aligned nematic LCs of negative dielectric anisotropy using nanoscale particles of varied sizes and concentrations will be controlled and electro-optical as well as dielectric behaviour will be studied.
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