antibacterial effect assessment of zns: ag nanoparticles

objective(s): a large ratio of surface to volume of nanoparticles in comparison with bulk ones, will increase the cell penetration and therefore their toxicity. materials and methods: chemical precipitation method was used in order to synthesis of zns:ag quantum dots. their physical properties and characteristics were assessed by x-ray diffraction, ultra violet-visible spectrophotometer, transmission electron microscope and it was shown that the obtained zns:ag quantum dots are cubic with high-quality. antibacterial effects of zns:ag nanoparticles against pseudomonas aeroginosa, staphylococcus aureus and salmonella typhi were investigated. disc bacteriological tests were used in order to assessment of the antibacterial effects of zns:ag nanoparticles. results: the size of inhibition zone was different according to the type of bacteria and the concentrations of zns:ag qds. the maximum diameter was happened for s. aureus. the results of  mics obtained frombroth dilution for pseudomonas aeruginosa , staphylococcus aureus and salmonella typhi, are 3.05 , 3.05 and 6.1 mg/ml whereas the amounts of obtained mbcs are 12.2 , 6.1 and 12.2 mg/ml respectively. conclusion: in conclusion, by increasing the nanoparticle concentration in wells and discs, the growth inhibition and diameter of inhibition zone has also been increased.