Nanotechnology is a manipulation of matter on an atomic, molecular, supramolecular scale. Nanotechnology may be able to create many new materials and devices with a vast range of applications in nanomedicine, nanoelectronics and biomaterials, energy production, etc. Nanoscience identifies the unique properties and characteristics of matter at the molecular level. The synthesis of metallic nanoparticles has been increased and the purpose is to minimize the negative impacts of synthetic procedures, their accompanying chemicals and derivative compounds. Surface functionalized magnetic iron oxide nanoparticles (NPs) are a kind of novel functional materials, which have been widely used in the biotechnology and catalysis. This review focuses on the recent development and various strategies in preparation, structure, and magnetic properties of naked and surface functionalized iron oxide NPs and their corresponding applicationbriefly.

Zinc oxide nanoparticles, Iron oxide nanoparticles, Green Synthesis, antibacterial activity, nanotechnology.