Table of Contents
Journal of Nanoscience
Volume 2014, Article ID 905404, 8 pages
http://dx.doi.org/10.1155/2014/905404
Research Article

Biosynthesis and Characterization of Gold and Silver Nanoparticles Using Milk Thistle (Silybum marianum) Seed Extract

Department of Physics, Annamalai University, Annamalainagar, Tamil Nadu 608 002, India

Received 26 November 2013; Accepted 18 January 2014; Published 12 March 2014

Academic Editor: Liqiang Jing

Copyright © 2014 R. Gopalakrishnan and K. Raghu. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Biogenic synthesis of gold and silver nanoparticles from aqueous solutions using milk thistle (Silybum marianum) seed extract as reducing and stabilizing agent has been reported. Formation and stabilization of nanoparticles were monitored using surface plasmon resonance (SPR) bands of UV-Vis spectroscopy. Morphology of gold and silver nanoparticles was investigated using X-ray diffraction, high-resolution transmission electron microscopy with selected area electron diffraction analysis, and dynamic light scattering. Fourier transform-infrared spectroscopy was employed to identify the possible biomolecules responsible for the reduction and stabilization of nanoparticles.