Synthesis of Gold Nanoparticles by L-Alanine and their Stability with Chitosan

Gold Nanoparticles are the most important and applicable Nanoparticles which are being used in Nanotechnology and Nano-Medicine. Therefore, it is important to find out /use suitable techniques to synthesize and prepare nanoparticles with different and suitable size, shape and distribution for various applications. In this article, preparation of gold nanoparticles by chemical reduction method and application of L-Alanine as a reducing has been discussed. In this study, HAuCl4. 3H2O was used as pre-material (pre-cursor) and Chitosan were used as natural surfactant to stabilize the synthesized particles. The size distribution and formation of gold Nanoparticles were confirmed by transmission electron microscopy and UV spectroscopy indicating the diameter of gold nanoparticles at the range of 15-40 nm with fine distribution. The formed nanoparticles and stabilized with chitosan analyzed by UV-Vis spectroscopy that showed the highest absorption at 544 nm, and were stable for 20 days.