Theses and Dissertations Collection

In this study, Gold nanoparticles were synthesized by reduction reaction method between chloroauric acid (HAuCl4) and sodium citrate (Na3 C6 H5 O7). These two agents, gold chloride concentration and sodium citrate concentration were changed while the other experimental parameters such as temperature and mixing rate were kept at the same level which effects on particle size and size distribution. The size and the shape of gold particles can be characterized by using scanning electron microscopy (SEM). The particle sizes can be produced in a range of 0.99 to 5.3 μm, and these particles have a spherical shape. In addition, the UV-visible spectroscopy was used in this study to investigate the efficiency of the absorbance of light at various diameters of gold nanoparticles. Also, the vapor liquid solid method was utilized to explore the range of sizes that most efficiently produces nanosprings.