TITLE:
Biological Synthesis of Colloidal Gold Nanoprisms Using Penicillium citrinum MTCC9999
AUTHORS:
Achintya Mohan Goswami, Sanjay Ghosh
KEYWORDS:
Gold Nanoprism; Green Synthesis; Penicillium citrinum; Transmission Electron Microscopy (TEM); Zeta Potential; Fourier Transformed Infra Red Spectroscopy (FTIR)
JOURNAL NAME:
Journal of Biomaterials and Nanobiotechnology,
Vol.4 No.2A,
April
17,
2013
ABSTRACT: This report provides for the first time
rapid novel environment friendly cell surface based synthesis of stable gold nanoprisms at room temperature using Penicillium citrinum MTCC9999 biomass. The UV-Visible spectral scan of dispersed gold nanoparticles (GNPs) solution showed absorption maxima at
540 nm due to surface plasma resonance (SPR)
of gold nanoparticles. Typical Transmission Electron Microscopic (TEM) images showed
that most of them were prism (55%) shaped with a diameter ranging from 20 - 40 nm. These results obtained from TEM
correlated well with the data obtained from Dynamic Light Scattering (DLS) experiment.
Average zeta potential of GNPs was -20 mV suggesting some biomolecules capped
the nanoparticles imparting a net negative charge over it. FTIR analysis also showed
that protein molecules were involved in stabilization.