Study of Lysine and Asparagine as Capping Agent for Gold Nanoparticles

Abstract The wide application of gold nanoparticles has attracted much attention to the development research in nanoparticles. In this study, were prepared by chemical reduction method using potassium tetrachloroaurate as source and sodium borohydride reducer agent. formation was confirmed surface plasmon spectra ultraviolet-visible spectroscopy at wavelength 507 nm. capping process studied two different charges amino acids. asparagine had used uncharge acid lysine a positive charge acid. redshift showed aggregation after being capped with acids that indicates modification. amine carboxylate group present on nanoparticle zeta potential results indicate have slightly higher stability than These modification are expected increase their utilization biological medical applications.