Facile and one pot synthesis of gold nanoparticles using tetraphenylborate and polyvinylpyrrolidone for selective colorimetric detection of mercury ions in aqueous medium.

ABSTRACT: In this work, we reported for the first time, a facile and one step synthesis of gold nanoparticles from HAuCl(4), employing tetraphenylborate as the reducing agent. The synthesis is not only facile but also yields "dumb-bell-shaped"particles. This shape appears to arise from a possible emulsion of the products of oxidation/decomposition of tetraphenylborate by HAuCl(4), surrounding the particle. The size and shape of the AuNPs were characterized by Transmission electron microscopy (TEM) and UV-visible Spectroscopy. Interestingly, the addition of polyvinylpyrrolidone (PVP) during the synthesis was found to enhance the stability of the nanoparticle dispersion. The particles synthesized under these conditions assume "spherical" shape with the appearance of only transverse surface plasmon res

SUBMITTER: Boopathi S 

PROVIDER: S-EPMC3335305 | biostudies-literature | 2012

REPOSITORIES: biostudies-literature