Biosynthesis of silver nanoparticles and its antibacterial activity using seaweed Urospora sp.

Abstract

In the present research work, biosynthesis of silver nanoparticles and its activity on bacterial pathogens were investigated. Silver nanoparticles were rapidly synthesized using Urospora sp. and the formation of nanoparticles was observed within 30 min. The results recorded from UV–vis spectrum, Fourier Transform Infrared Spectroscopy (FTIR), X-ray diffraction (XRD) and High Resolution Transmission Electron Microscopy (HRTEM) support the biosynthesis and characterization of silver nanoparticles. From HRTEM analysis, the size of the silver nanoparticles was measured 20 to 30 nm. Further, the antibacterial activity of synthesized silver nanoparticles showed effective inhibitory activity against the pathogens namely: Staphylococcus aureus, Escherichia coli and Pseudomonas aeruginosa. Key words : Urospora sp, silver nanoparticles, biosynthesis, antibacterial activity.