Synthesis of gold nanoparticles of variable morphologies using aqueous leaf extracts ofCocculus hirsutus

Abstract

Spherical, triangular (prismatic) and square plate shaped gold nanoparticles have been synthesised from HAuCl 4 Á 3H 2 O solution using the aqueous leaf extract of Cocculus hirsutus. Nanoparticles are characterised using higher resolution transmission electron microscope, X-ray diffraction and UV-Vis absorption spectroscopic study. FT-IR analysis reveals that the gold nanostructures are mostly stabilised by the carbonyl and amide groups present in the active component of C. hirsutus leaf extract. Formation of gold nanostructures of variable morphologies has been explained due to slow reduction of gold ions by the mild reducing ascorbic acid present within the extract and this controlled reduction assists the preferential deposition of Au atom on different lesserprotected faces of initially grown gold nanostructure.

Bio-fabrication of gold nanoparticles using aqueous extract of red tomato and its use as a colorimetric sensor

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Green, Selective, Seedless and One-Pot Synthesis of Triangular Au Nanoplates of Controlled Size Using Bael Gum and Mechanistic Study

“…The selective and exclusive synthesis of Au triangular nanoplates using natural products with control over size and size distribution is still an elusive subject. More importantly, the mehanism of growth under these conditions is still in its infancy. ,− …”

Microwave-assisted synthesis of anisotropic gold nanocrystals in polymer matrix and their catalytic activities

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