Manufacturing Technology Today

Kaushik Pal ¹, Tapas Pal Majumder ¹, Roman Dabrowski ²

Affiliations
1 Department of Physics, University of Kalyani, Kalyani-741235, West Bengal, IN
2 Institute of Chemistry, Military University of Technology, Warsaw, PL

Abstract

In this hydrothermal chemical route ZnO nanowires have been successfully synthesized. The branch of these nanowires grown in standing mode on ITO coated glass substrate and agglomeration of these branches turns into nano flower like structure with CTAB assisted solution phase approach. These entire nano flowers aligned on spin casted by anti ferroelectric liquid crystal (W-182) layer over ITO coated glass substrate. FE-SEM and XRD have been used to characterize the product. UV-Vis and photoluminescence spectra of the nano flowers have taken to study their optical properties. Again, ZnO nanospikes of length from 745 to 900 nm those were grown as micro-flowers with diameter of 1.2μm through simple solvo chemical route. Nano capsules of diameter 186 nm and length 576 nm were gathered along with nano rods of diameter ranging from 644 to 966 nm and those were obtained by the variation of chemical composition of capping reagent hydrazine hydrate grown at 55°C-60°C. By introducing a surfactant cetyltrimethylammonium bromide instead of hydrazine, we obtained uniform sized nanoparticles of diameter 150 nm with well crystalline by applying high temperature and pressure inside the stainless steel autoclave. The proportionality ratio of solvent, reaction time and temperature, helps new prominent growth for this ZnO nanoparticle structure. Even the cause of the commonly observed interesting features for pure and nanodoped anti-ferroelctric liquid crystal (W-182). Comparative study reveals that the optical and electric behaviors drastically differ from those pure nanostructures with ZnO nanostructure doped AFLC. This fabrication strategy and mainly nanodoped technique phenomenological unique for dielectric and bi-stable switching has also promising applications in opto-electronics display devices.

Keywords

ZnO Nanostructures, Hydrothermal, W-182 (AFLC), Optical, Dielectric, DC Conductivity, Bi-Stable Switching.

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