Crystal Growth of l-Alanine Oxalic Acid Crystal and its Spectral, NLO, Mechanical, Thermal, and Impedance Properties

Single crystals of l-alanine oxalic acid (LAO) were grown by adopting the slow evaporation technique at room temperature. Single-crystal x-ray diffraction was used to evaluate the crystal structure of the as-grown LAO. The functional groups of LAO were identified by FT-IR spectroscopy. UV-Visible-NIR transmittance study was carried out to determine the bandgap energy. A fluorescence study was performed to obtain the emission spectrum of the LAO crystal. Vickers microhardness study was carried out to evaluate the mechanical properties of the LAO crystal. Thermogravimetric and differential thermal analysis were also conducted to investigate the thermal properties of the LAO crystal. The efficiency of the title crystal's second harmonic generation (SHG) was investigated. The electrical properties were estimated by impedance study. A laser damage threshold (LDT) study revealed that the LAO crystal has a high laser damage threshold.