Farzaneh Naseriyan - MS in Biomedical Engineering-Biomaterials Laboratory, Department of Life Science and Engineering, Faculty of New Sciences and Technologies, University of Tehran, Iran
Abdorreza S.Mesgar - Assistant Professor- Biomaterials Laboratory, Department of Life Science and Engineering, Faculty of New Sciences and Technologies, University of Tehran, Iran
Zahra Mohammadi - PhD in Materials Science and Engineering- Biomaterials Laboratory, Department of Life Science and Engineering, Faculty of New Sciences and Technologies, University of Tehran, Iran

Zinc oxide nanoparticles through precipitation process as a cost-effective and flexible process by two different routes were synthesized. The effect of changing process parameters on the structure, size and antibacterial properties of nanoparticles was investigated. FESEM micrographs showed that the nanoparticles synthesized using stabilizing agent and lower heat treatment temperature have a smaller in size and positive effect on the antibacterial properties of the nanoparticles. Copper-doped zinc oxide nanoparticles with appropriate concentration of copper ion showed increased antibacterial activity against Gram-positive Staphylococcus aureus than pure nanoparticles.

ZnO nanoparticles, Cu-doped ZnO, Antibacterial agent