Biosynthesis of anisotropic nanogold using binahong (Anredera cordifolia) Leaves extract as a morphology controlling agent

Abstract

Synthesis of anisotropic gold nanoparticles has been successfully conducted using raw phytochemicals from binahong leaves, extracted by boiling the leaves in double-distilled water. The synthesis was conducted in one step, i.e. by mixing the gold precursor with the extract of binahong leaves at certain ration, and heating with the aid of microwave irradiation. The as-synthesized gold nanoparticles were characterized by UV-Vis spectrophotometry and Transmission Electron Microscopy (TEM). The results showed that the blue colloidal anisotropic gold nanoparticles can be formed at several condition : extract from first, second or third boiling, at volume ratio of gold precursor : extract of 1 : 1 and 1 : 2, and AuCl4- of  0,6 mM. The stability of the gold nanoparticles were high at volume ratio of gold precursor : extract of 1 : 1 and when using extract from first boiling.