Vijayan N.,National Physical Laboratory India |
Madhurambal G.,ADM College for women |
Bhagavannarayana G.,National Physical Laboratory India |
Maurya K.K.,National Physical Laboratory India |
And 2 more authors.
Research Journal of Chemistry and Environment | Year: 2013
Nowadays nonlinear optical (NLO) materials are gaining attention because of their numerous applications in the area of fibre optic communication and optical signal processing. In the present study, the nonlinear optical material of benzimidazole (BMZ) has been grown by slow evaporation solution growth technique using two different organic dopants (Urea and N-methyl urea) at different molar percentages. The effect of dopants on the growth and other physical properties has been analyzed by different instrumentation methods. The addition of urea and N-methyl urea (NMU) to the host material of benzimidazole has not changed the existing crystalline system, but there was a trivial variation in the lattice dimensions which is confirmed by powder X-ray diffraction analysis. The crystalline perfection was analyzed by high resolution X-ray diffraction analysis. It was found that urea dopant enhances the crystalline perfection in comparison with the N-methyl urea, which is in tune with the scanning electron microscopic analysis. The thermal performance has been examined by TGDTA for all the doped specimens. Its relative second harmonic generation efficiency was evaluated by Kurtz powder technique and it was found that the doped specimens showed enhanced efficiency in comparison with the pure benzimidazole. Its optical properties have been examined by UV-VIS spectral analysis and found variations in the observed transmittance values were found. Source