Synthesis of gold nanoparticles using N,N-dimethylacetoacetamide: Size and shape control by the reaction temperature

Uniform Au nanoparticles were synthesized by a simple process, mixing HAuCl4 and N,N-dimethylacetoacetamide. These nanoparticles were characterized by UV–Vis, TEM, and EDX. N,N-dimethylacetoacetamide was effectively used as a reducing agent and stabilizing agent as well. The reaction temperature played an important role in the size-selective and shape-selective Au nanoparticle formation. The Au spherical nanoparticles obtained at room temperature had diameters of ∼100 nm whereas the spherical, triangle, square, and hexagonal shape mixtures were obtained at 100 °C with diameter range of ∼20 nm.