Antibacterial effect assessment of ZnO nanoparticles, ZnO: Fe nanoflower and magnetic fields

Chemical precipitation method was used in order to synthesize of ZnO quantum dots (2- 3nm) and ZnO:Fe nanoflower. Their physical properties and characteristics were assessed by X-ray diffraction (XRD), ultraviolet-visible (Uv) spectrophotometer and Transmission Electron Microscope ( TEM) and it was shown that the obtained ZnO:Fe quantum dots have a hhexagonal crystal structure of a high-quality. Antibacterial effects of ZnO:Fe nanoparticles against some pathogenic bacteria were investigated. Staphylococci aurous and Escherichia coli were used as test microorganisms. Disc bacteriological tests were used in order to assess the effects of ZnO:Fe concentration (0.35 to 6 mg/mL) as antibacterial. The magnetic field with nanoparticles with different concentrations of ironcontaminated oxide has no effect on stopping the growth of Staphylococcus aureus and Escherichia coli bacteria in the field. The sizes of inhibition zone were different according to the type of bacteria and the concentrations of ZnO:Fe nanoflower, the maximum diameter being observed for Staphylococcus aurous.