Fabrication, optimization, and characterization of ultra-small superparamagnetic FeO and biocompatible FeO@ZnS core/shell magnetic nanoparticles: Ready for biomedicine applications.

Magnetic nanoparticles that preferred for biomedical applications are required to be biocompatible, nanosized and superparamagnetic. In this research, ultra-small superparamagnetic FeO nanoparticles and novel superparamagnetic FeO@ZnS core/shell nanocomposites were fabricated using biocompatible ethylenediaminetetraacetic acid (EDTA) as a capping agent by a facile refluxing assisted co-precipitation method at optimum condition. The FeO and FeO@ZnS nanoparticles were investigated using X-ray diffraction (XRD), scanning and transmission electron microscopy (SEM and TEM), UV-Vis spectroscopy, vibrating sample magnetometer (VSM) and Dynamic Light Scattering (DLS).