Effect of various concentrated copper and plant extract concentrations on the antibacterial activity.

Abstract

Copper nanoparticles (Cu NPs) were created using two methods, one with reducing and stabilizing agents and the other with green tea extract. The formation of Cu NPs has been described by spectra of UV-Vis absorption, which showed the surface plasmon resonance (SPR) at 620 and 630 nanometers, respectively. The position and shape of the surface plasmon resonance and plasmon absorption bands strongly depend on the reaction conditions. The crystalline morphology and size of the nanoparticles were determined by XRD, FESEM, and TEM studies. In both ways, the average particle size of Cu nanoparticles was found to be in the range of 28 nm and 142 nm for the chemical and green methods, respectively. The effectiveness of the materials prepared by both methods was high, and the antibacterial activity of the products prepared by both ways was against E. coli and S. aureus pathogens represented by inhibition zones ranging from 14–20 mm, 30–38 mm, and 11–18 mm, 20–24 mm, respectively.