Novel Approach for Silver Nanoparticle Synthesis Using Aspergillus terreus CZR-1: Mechanism Perspective

A novel biological approach for the rapid and cost effective synthesis of silver nanoparticles was attempted in the limelight of nanotechnology research. The present study demonstrates the synthesis of silver nanoparticle using fungus Aspergillus terreus CZR-1 (NCBI GenBank Accession No. JF 681300). The fungal isolate was identified on the basis of morphological and molecular parameters. Transmission electron microscope (TEM) was used for size and shape study that reveal the spherical structure of monodispersed silver nanoparticle. To ensure the elemental proportion, electron dispersive spectroscopy (EDS) was performed which confirms the 97 atom% of silver. The average size of silver nanoparticle was calculated using dynamic light scattering (DLS) was obtained to be 2.5 nanometer and the polydispersity index (PDI) was 0.195. The crystal structure of silver nanoparticle was confirmed by high resolution transmission electron microscope (HR-TEM) and selective area electron diffraction (SAED) pattern.