Dependence of Antibacterial Properties of Ag Nanoparticles on the Stabilizer and Storage Conditions

In the work dependence of the interaction of Ag nanoparticles with bacteria Bacillus clausii on the nanoparticles stabilizer and temperature has been studied. Three different stabilizers were used: sodium dodecyl sulfate, sodium citrate, and tryptophan. It has been observed that non-functionalized Ag nanoparticles suppress bacterial growth in a dose-depended manner, and the dependence of the antibacterial effect on the concentration of the nanoparticle is nonmonotonic. It has been also shown that nanoparticles stored in glassware under low-temperature lose their antibacterial activity. A theoretical model for the observed phenomena has been proposed.