Biosynthesis, characterization and nonlinear optical response of spherical flake-shaped copper oxide nanostructures

Abstract

The copper oxide nanoparticles (CuO NPs) were synthesized via solution combustion approach with Bengal gram powder as a fuel. The XRD analysis confirms the monoclinic structure of CuO NPs. FT-IR spectrum reveals the formation of CuO NPs. SEM studies show that the NPs are nearly spherical, and the elemental composition was confirmed by EDAX. The absorption spectra revealed a direct optical band gap of 1.50[Formula: see text]eV. DFT calculations were performed to determine the HOMO–LUMO energy bandgap and found to be 1.72[Formula: see text]eV, which is in good agreement with the experimental value. The Z-scan technique was used to investigate the third-order nonlinear optical (NLO) characteristics using DPSS continuous wave laser (532[Formula: see text]nm, 200[Formula: see text]mW). A high reverse saturation absorption and negative nonlinear refractions were observed. Third-order NLO parameters [Formula: see text], [Formula: see text] and [Formula: see text] were found to be [Formula: see text][Formula: see text]cm/W, [Formula: see text][Formula: see text]cm2/W and [Formula: see text][Formula: see text]esu, respectively. The CuO NPs also displayed strong optical limiting behavior with a limiting threshold of 2.11[Formula: see text]kW/cm2.

Green Synthesis of CuO Nanoparticles from Blackberry Leaves Extract (Rubus fruticosus) and Experimental Research of Its Effects on Emissions Analysis for IC Engines

“…For the synthesis of CuNPs with desired morphologies and properties, a variety of physical and chemical methods have been described, including microwave irradiation, thermal decomposition, sol-gel, colloidal thermal synthesis, sonochemical, hydrothermal, and rapid precipitation. [28][29][30][31] However, these techniques demand a lot of effort, energy, time-consuming approaches, costly, and toxic chemicals.…”