It has been studied elsewhere that when metallic nanoparticles are formed they are stabilized by the proteins. Proteins can bind to nanoparticles either through free amine groups or cysteine residues in the proteins [25, 26]. Chemical synthesis results in the formation of yellowish brown colour which results from absorption by colloidal silver nanoparticles in the visible (380-450 nm) region of the electromagnetic spectrum. The colour formation was mainly due to the surface Plasmon resonance of deposited silver nanoparticles and silver nanoparticles exhibit striking colors due to excitation of surface Plasmon vibrations in the particles [27].