A green approach for the synthesis of gold nanotriangles using aqueous leaf extract of Callistemon viminalis

In this present work, we developed a green method for the synthesis of stable Au NPs that does not require any of the conventional stabilizing ligands. This synthesis can be performed in minutes rather than hours, under very mild conditions using aqueous leaf extract of Callistemon viminalis. Gold nanotriangles so prepared were well characterized by powder X-ray diffraction (XRD), transmission electron microscopy (TEM), quasi elastic light scattering (QELS), UV-visible spectroscopy techniques etc. Powder X-ray diffraction plot revealed the presence of only gold in zero oxidation state. (C) 2010 Elsevier B.V. All rights reserved.