Biosynthesis of Gold and Silver Nanoparticles using Aqueous extract of Artemisia dracunculus

Plants as stable and available sources to preparation of the biocompatible nanoparticles that have received much attention in recent years. The advantages of this method can be referred to inexpensive, non-toxic, producing nanoparticles with high purity, low response time and the reaction is complete. Objectives of this study were optimization and characterization of biosynthesis of gold and silver nanoparticles using aqueous extract of Arte-misia dracunculus. After carefully washing, drying and grinding the leaf of the plant, 1 g of powdered herb was heated in 100 ml of distilled water for 30 min at 50◦c. After filtration and preparing the extract, 2 ml of it, was added to 4 ml of HAuCl4.3H2O and AgNO3 with concentration 1 mM, which reduced metal ions to metal with size nanometers, and quickly the color of solutions changed to violet and brown respectively. In order to get NPs with uniform shape and size, parameters affecting biosynthesis such as pH of the reaction, volume of plant extract, concentration of metal ions solution, temperature and time of reaction were studied and optimized using UV-Vis spectrophotometry. X-ray diffraction (XRD) and transmission electron microscopy (TEM) were also employed to find characterization of the nanoparticles. It was found that the synthesized nanoparticles have spherical shape .and the average size of gold nanoparticle were 14 nm and for silver nanoparticles were 18 nm

کلیدواژه ها:

Biosynthesis ، Gold Nanoparticles ، Silver Nanoparticles ، Artemisia dracunculus