10.22376/ijpbs.2019.10.1.p1-12 Volume 3 Issue 4 2012(October - December) In this study, we report the synthesis of silver nanoparticles (SNP) by plant mediated ( lessThan i greaterThan Azadiracta indica lessThan /i greaterThan ) and chemical methods. The synthesized SNP were characterized by UV-Visible spectroscopy, Scanning Electron microscopy(SEM) and Fourier transform infrared(FT-IR) spectroscopy. The antibacterial effect of SNP produced by both the methods was evaluated by growth inhibition study which showed strong antibacterial activity against gram positive and gram negative bacterial strains. ELAVARASI NATARAJAN, BHARATHI PURUSHOTHAMAN, POONGODI PALANISAMY, DIVYA SOMASUNDARAM AND SHALU SUBATHRA Silver nanoparticles ; characterization; Scanning Electron microscopy(SEM); Antibacterial activity. 264-273