Original Articles: 2015 Vol: 7 Issue: 7
Mycological synthesis and characterization of silver nanoparticles by Aspergillus species
The fungi species have ability to reduce the silver nitrate to silver nanoparticles. Hence the present work was focused on extracellular biosynthesis and characterization of silver nanoparticles synthesied using fungi Aspergillus niger and Aspergillus terreus. The preliminary detection of silver nanoparticles was carried out by visual observation of colour change from yellow to brown colour. UV absorption spectrum at 420 nm confirms the presence of silver nanoparticles in the filtrate. The functional groups present on the synthesized nanoparticles were found using Fourier Transform Infrared Spectroscopy with the peaks in the range of 560–3690cm-1. The presence of silver nanoparticles in the sample was confirmed using Energy Dispersive Spectroscopic analysis. Silver nanoparticles synthesized from A. niger and A. terreus were in the size range of 26.5-100 nm and found to be compactly arranged and spherical in shape.