Technical Session 6:

Title:         Characterization and Contrast Enhancement of ZnO Nanoparticles Dispersed 6OCB Liquid Crystalline p-n-hexyloxy cyanobiphenyl Compound
Authors:     P Jayaprada, B T P Madhav, P Pardhasaradhi, G Giridhar, T E Divakar, R K N R Manepalli
Abstract:   In the present paper synthesis and characterizationare carried on ZnO nanoparticles dispersed in Liquid Crystalline p-n-hexyloxy cyanobiphenyl (6OCB) compound. We have ZnO reported nanoparticles are synthesized by Autoclave method which is having a broad range of applications and dramatically effects the birefringence properties of 6OCB when dispersion with low concentration. The Polarizing Optical Microscopy (POM) technique is used to measure the phase transition temperatures along with texture identification. Further characterization is carried out by various spectroscopic techniques like X-ray Diffraction Studies (XRD), Scanning Electron Microscopy (SEM), and Ultra Violet Visible (UV-Vis) spectroscopy. Textural determinations of the synthesized compounds are recorded by using POM connected with a hot stage and camera. The results showed that the dispersion of ZnO and in 6OCB exhibit nematic phase as same as the pure 6OCB with slightly reduced clearing temperature as expected. Image processing based contrast enhancement for better visibility and for the identification of liquid crystalline phases also performed with linear stretching method.

Keywords:   Synthesis, POM, DSC, Nano-dispersion, XRD, SEM and UV
Pages:         176-180

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