A Report On The Stability Of Herbal Synthesized Ag Nanoparticles And Their Antibacterial Activity

An ecological method of green mediated synthesis of nanoparticles is significant step in the field of nanotechnology. In this method we have examined green synthesis of Ag nanoparticles using a mixture of Salix viminalis leaves extract as a reducing agent and surfactant (CTAB) as stabilizer. These green synthesized nanoparticles characterized with the help of UV–vis spectrophotometer, DLS, FTIR, and TEM. Nanoparticle size distribution was determined within 1 to 100nm by TEM and DLS and the optimum wavelength was recorded in 400 to 450nm by UV-vis spectroscopic studies. The chemical groups readings using FT-IR analysis. FT-IR spectrum shows that the nanoparticles are destined to protein through the carboxylate ion group. In this study we observed that S. viminalis leaf extract reduce Ag ion in to Ag nanoparticles within 10mins of reaction time which indicated that it is a rapid synthesis. These synthesized Ag nanoparticles showed good antibacterial properties against both E. coli (gram -ve) and S. aureus (gram +ve) with the maximum 11mm inhibition zone. Additionally we have examined that synthesized Ag nanoparticles are quite stable and remain intact for approximately three months. This is the most useful & interesting step in this work.