Green synthesis, characterization, linear and nonlinear optical properties of copper oxide nanoparticles using <i>Senna auriculata</i> leaf extract
S Sujitha, A. G. Bharathi Dileepan, G. Murali, Natarajan Arumugam, Abdulrahman I. Almansour, Kasireddy Sudarshan, S. Jeyaram
Abstract
This work reports the green synthesis of copper oxide (CuO) nanoparticles (NPs) using Senna auriculata leaves for the first time to the best of our knowledge. The NPs were characterized by UV-DRS, Fluorescence, FT-IR, FT-Raman, XRD, TGA-DSC, TEM and SEM with EDS analysis. The functional group of the CuO NPs was identified using FT-IR and FT-Raman spectroscopic techniques. The X-ray diffraction tool revealed the crystalline property of the CuO NPs, and the average crystal size was measured to be 44.6 nm. The morphology of the CuO NPs was analyzed by SEM and TEM techniques. Third-order nonlinear optical (NLO) properties of the CuO NPs were studied using a solid-state diode laser working at 405 nm wavelength. The nonlinear refractive index and nonlinear absorption coefficient of the CuO NPs was attributed to self-defocusing and saturable absorption. The third-order NLO susceptibility of CuO NPs was measured to be 7.60 x 10−7 esu. The green synthesis of CuO NPs from S. auriculata leaf extract has been suggested to be a good option for future photonics and optoelectronics applications based on the experimental results.