Extracellular biosynthesis of gold nanoparticles using a gram negative bacterium Pseudomonas fluorescens

ObjectiveIn the present study, the extracellular synthesis of gold nanoparticles were made by making use of Pseudomonas fluorescens.MethodsThe nanoparticles obtained were characterized by UV–vis, transmission electron microscopy (TEM), Scanning electron microscopy (SEM) and FTIR spectroscopy.ResultsSynthesized nanoparticle size ranged from 50–70 nm. FTIR spectrum indicates that the biomolecule cap the nanoparticles.ConclusionsHence the present study enlightens the green chemistry approach on the production of gold nanoparticles using a microorganism. In comparison to chemical synthesis, the synthesis of gold nanoparticles by microbial source is the most reliable method of production and yield.