Technical Session 6:

Title:           Birefringence Studies on Alkoxy Benzoic Acids with Dispersed Fe3O4 Nanoparticles
Authors:      J.Sivasri, M.Tejaswi, K.Pandian, Mc Rao, R.K.N.R. Manepalli
Abstract:   Author has determined orientational order parameter of p-n-alkoxy benzoic acids (11OBA and 12OBA) which has long range nematic phase. 1wt% Fe3O4 nanoparticles are dispersed in 11OBA and 12OBA separately. These compounds are characterized by Spectroscopic techniques such as Polarizing Optical Microscope (POM), Differential Scanning Calorimetry (DSC) and Scanning Electron Microscopy (SEM). Further the refractive indices measurements are carried out using a wedge-shaped cell with the help of a modified spectrometer. The birefringence anisotropy is obtained directly by using the method developed by Kuczynski et al. in all the available compounds. The order parameter S, from birefringence anisotropy is calculated and has increased with the dispersion of Fe3O4 nanoparticles which is advantageous.

Keywords:   POM, SEM, Birefringence anisotropy, Orientational order parameter.
Pages:         194-200

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