Characterization of zein stabilized silver  nanoparticles fabricated under gamma irradiation

Omayma A.Ghazy; Yasser K. Abdel-Moneam; Shimaa Nabih; Magdy M.Senna

Volume : III, Issue : V, May - 2013

Characterization of zein stabilized silver nanoparticles fabricated under gamma irradiation

Omayma A. Ghazy, Yasser K. Abdel Moneam, Shimaa Nabih, Magdy M. Senna

Abstract :

In this study, we attempted to control the faication of Ag nanoparticles using gamma radiation in presence of zein as green stabilizer. The effect of silver ion concentration and zein polymer concentration, on the Ag particle size was studied. The characterization of the silver nanoparticles was done by UV–Visible spectroscopy, X–ray diffraction (XRD) and transmission electron microscopy (TEM). The UV–visible absorption showed the formation of the surface Plasmon resonance peaks corresponding to the Ag nanoparticles in the range of 416–431 nm. A blue shift was observed as the zein concentration increased indicated the formation of smaller particles, while a red shift was observed with increasing the silver ion concentration indicated the formation of larger particles. The XRD confirmed the formation of the silver metal nanoparticles and the TEM imaging reveals that the Ag nanoparticles are spherical in shape, and no aggregates were formed. The as prepared Ag nanodispersions were stable over 9 months at room temperature.