Green Synthesis of Gold Nanoparticles Using Neem (Azadirachta indica L.) Leaf Extract and Its Biomedical Applications

Eco-friendly green synthesis is one of the promising branches of nanoscience for applications in different biomedical fields. It makes more attractive potential option due to non toxic and very low cost of synthesis. This paper deals with the synthesis of eco-friendly and cost effective gold nanoparticles by using leaf extract of neem (Azadirachta indica) as reducing agent. The SEM image shows that the gold nanoparticles are predominantly spherical in morphology whereas TEM image shows different shapes like hexagonal, triangular and spherical. DLS results indicated that the particle and dispersity of gold nanoparticles represented effective diameter of about 15:1nm and polydispersity index (PDI) 0.643. Thus, this rapid, eco-friendly and economical route can be used to synthesize HAuCl4 with wide range of biomedical applications.