Screening of marine bacteria as a catalyst in the biological synthesis of tellurium nanoparticles

Nanoparticles are tiny materials having size ranges from 1 to100 nm. Over recent decades, Tellurium applications continued to emerge in different fields including metallurgy, glass industry, electronics, and applied chemical industries. Tellurium nanostructures are used in labeling, imaging, and targeted drug delivery systems and are tested for antibacterial or antifungal properties. In this paper, the green synthesis of Te nanoparticles (TeNPs) by the marine bacterial strains is described. Twenty telluriteresistant bacterial strains screened according to selective enrichment technique. Based on the results, only strain MTe05 was able to synthesis and accumulates of TeNPs. The strain of MTe05 was selected as superior strain and identified as Alacaligenes sp. MTe05 based on the phenotypic and phylogenetic analysis. The prepared nanoparticles were examined using Optical emission and absorption spectroscopy analyses, scanning electron micrograph analysis and Fourier-transform infrared spectroscopy (FTIR). TeNPs display an optical absorption bond at 400 nm and the presence of elemental tellurium was confirmed by Energy dispersive x-ray (EDX) analysis. This strain synthesized nanoparticles under a variety of conditions. Scanning electron microscopy (SEM) and Transmission electron microscopy (TEM) micrographs showed both extra and intracellular synthesis of Tenanoparticles.

کلیدواژه ها:

Alacaligenes sp. strain MTe05 ، Green synthesis ، Tellurium Nanoparticles ، Intra/Extra-cellular