Published on April 2014 | Microbiology, Bacteriology, Nanotechnology, Seaweeds, Instrumentation

Biosynthesis of silver nanoparticles from marine alga Colpomenia sinuosa and its antibacterial efficacy

Silver nanoparticles are known to be good antibiotic agents. In this study biosynthesis of silver (Ag) nanoparticles of marine alga, Colopomenia sinuosa were obtained by the green synthesis method and their efficacy was studied against Gram-positive and Gram-negative bacteria. The efficacy was performed using Kirby Bauer Method and MIC, MBC was also determined. The extracellular mechanism of silver nanoparticle formation was characterized by UV-vis spectroscopy, Fourier Transform Infrared (FT-IR) Spectroscopy-ray Diffraction (XRD), and Scanning Electron Microscopic (SEM) study showed the formation of silver nanoparticles in the range of 54-65 nm in size. Silver nanoparticles showed greater efficacy towards Gram-positive and Gram-negative microorganisms compared to the standard antibiotics.