Biosynthesis of metal nanoparticles by probiotic bacteria

Abstract

Nanoparticle synthesis requires a clean, non-poisonous and envioromental-compatible methods. Cations are absorbed on the surface layer of probiotics due to negative electro-kinetic potential of cell wall and this leads to biosynthesis of metal particles (usually nanoparticles). This review aims to track the field of biosynthesis of nanoparticles by probiotic bacteria. Therefore, after some introduction bout nanoparticles and the microbial synthesis, all metal nanoparticles/oxide nanoparticles produced by probiotics are reviewed including silver, zinc, zinc oxide, titanium, titanium oxide, selenium as well as Sb2O3, Gd2O3, CdS nanoparticles. Production of nanoparticles gives antibacterial properties to the microorganism. Consequently, such extraordinary properties for probiotics with their own several health beneficial effects is killing two birds with one stone. It can be concluded that the capability of microorganisms to make metal nanoparticles with favorable morphological features and ideal size ranges has introduced a new and intersting approach to nanoparticle synthesis.