Growth and Characterization of Benzaldehyde Derivatives Single Crystals for Optical Applications

Abstract

ABSTRACT newline newline newline newline newlineSingle crystal growth has prominent role to play in the present era of rapid technical and scientific advancement, where the application of crystals has unbounded limits. Modern technology is based on single crystals of nonlinear optical, lasers, optical communication ferroelectric, semiconductor, superconductor and acousto-optic materials. On the other hand, the rapid advances in microelectronics, in communication technologies, in medical instrumentation, in energy and space technology were only possible after the remarkable progress in fabrication of large, rather perfect crystals. No other process in modern science attracts larger attention than the growth of single crystals. Everyday new materials are being grown and new devices are coming out of these crystals. The only materials whose properties we can understand and explain in depth are single crystals of high purity. The researchers have prompted to search for the newer promising materials. The aim is to grow large size good quality transparent crystals to be used in the technological applications. newlineThe thesis consists of seven chapters. The first chapter reveals the introduction of the crystal growth, solution growth technique, review of organic nonlinear optic crystals, and the characterization techniques. newlineThe second chapter discusses the growth and characterization of organic 4-dimethyl aminobenzaldehyde single crystal by slow evaporation technique. The grown crystal was confirmed by single crystal and powder X-ray Diffraction (XRD) studies. The functional groups present in the grown crystal have been confirmed by Fourier Transform Infrared (FTIR) and FT-Raman studies. The functional groups of the crystal have been identified from the FTIR and FT-Raman studies. The optical property of the grown crystal was analyzed by UV-Vis-NIR and Photoluminescence (PL) spectral measurements. The thermal behaviour of the grown crystal was analysed by Thermogravimetric (TG) and Differential Thermal Analyses (DTA). The Dielectric measurements wer