Green synthesis of copper nanoparticles using Uncaria gambir roxb. Leaf extract and its characterization

Abstract

In this paper, the copper nanoparticle has been synthesized based on green synthesis method using Uncaria gambir Roxb. leaf extract without capping agent or external energy. It was characterized by UV-Visible Spectrophotometry, X-ray Diffraction, Fourier Transform Infra-red, and Transmission Electron Microscopy analysis. Copper nanoparticles formation was recognized by color changes to dark brown and was furtherly proven by UV-Vis spectrophotometer analysis based on the absorption band at 400 to 415 nm. X-ray Diffraction pattern performed three sharp peaks specifically referred to face-centered cubic structured of metallic copper. Transmission Electron Microscopy analysis result confirms the spherical copper nanoparticles formation in diameter of 2.5-15 nm.