Physical properties of some nanometal oxides: Synthesis and laser-anti-bacterial application

Abstract

      In the present work, metal oxides CdO, NiO and Cd_xNi_1-xO nanopowders (where x = 0, 0.5, and 1) were created by a simple chemical co-precipitation technique followed by calcination to be  used against Staphylococcus aureus. The synthesized nanoparticles were characterized by XRD, FE-SEM, and PL spectroscopy analysis. Also, Diode laser with (650 nm wavelength and 50 mW power) was used as antibacterial agents. Calcination affects lead to improve crystallinity and decreasing of the impurities. Substitution of Cd²⁺ by Ni⁺² with 1000 ppm increase the killing of bacterium compared with pure nano oxides. Increasing the irradiation time led to increase the killing of bacterium. The antibacterial activity of the substitute Cd⁺² by Ni⁺² with present laser enhanced antimicrobial efficiency in S. aureus bacterium compared to that of pure metal oxides.