Terminalia chebula Retz. gallic acid - biased silver nanoparticles and their antiphytopathogenic activity

Owing to the unique properties, nanomaterials play a major role in many areas of science and technology. In this article, the antiphytopathogenic activity of gallic acid reduced Terminalia chebula Retz. silver nanoparticles (Ag NP) was studied. AgNO^sup 3^ (10^sup -3^ M) stock solution was prepared by dissolving 17mg of silver nitrate in 100ml of double distilled water. About 10ml of gallic acid solution isolated from Terminalia chebula Retz. Combretaceae was added to 90ml of 10^sup -3^ M AgNO^sup 3^ solution for reduction of Ag^sup +^ ions. The reduction of pure Ag^sup +^ ions was monitored by measuring in the UV-Vis Spectroscopy at 426nm. Determination of the shape and structure of silver nanoparticle was characterized by Transmission Electron Microscopic and X-ray Diffraction studies. The plasma resonance of the gallic acid reduced silver particle is brownish yellow. In the light of these studies, the shape of the silver nanoparticle (spherical) and face centered cubic structure were explained.