Green Synthesis of Gold Nanoparticles Using Cinnamomum verum, Syzygium aromaticum and Piper nigrum Extract

Abstract

Recently, nanoparticles have gained significance in the field of biomedicines but use of the chemical reducing agent in their preparation, limit it in the field of biomedicine. Hence, we have synthesized gold nanoparticles (AuNPs) by stirring the appropriate volume of aqueous extract of Cinnamomum verum (dried bark), Syzygium aromaticum (dried flower buds) and Piper nigrum (dried berries) with aqueous solution of chloroauric acid (Au3+) by greener method. The UV-visible spectrum of AuNPs showed a broad band in the region 543-546 nm corresponding to the surface plasmon resonance band (SPR) of AuNPs. The position of band did not change even after 2 weeks, depicting the stability of prepared nanoparticles. FESEM and DLS confirmed their size and dispersity. Furthermore, the rate of formation of nanoparticles using different spice extracts as reducing agent give an indication towards the concentration of active components present in them i.e. Syzygium aromaticum is the better reducing agent as compared to Cinnamomum verum and Piper nigrum.