Abstract
In the present work, non-toxic luminescent ZnO nanoparticles (NPs) and magnetic Fe3O4 NPs were separately prepared by co-precipitation method. In order to get the [email protected]3O4 nanocomposite (NCs), both these NPs were embedded in silica matrix. Powder XRD reveals that the formation hexagonal wurzite structure of ZnO and cubic inverse spinel structure of Fe3O4. Both phases were combined in the prepared [email protected]3O4 NCs. FT-IR spectra showed the absorption peaks confirmed the presence of metal-oxygen stretching bands in ZnO NPs, Fe3O4 NPs and [email protected]3O4 NCs samples. VSM results showed both magnetite and [email protected]3O4 have superparamagnetic, whereas the saturation value for [email protected]3O4 NCs was tremendously decreased. Photoluminescence (PL) spectra of ZnO and [email protected]3O4 illustrated that both samples have very good luminescence property. PL intensity of [email protected]3O4 NCs has been reduced as compared to the intensity of bare ZnO NPs. However, [email protected]3O4 still hold very good luminescence property. The as-prepared [email protected]3O4 NCs were successfully demonstrated for magnetic resonance imaging contrast agent application. Hence, it can be simultaneously used for MRI contrast agent as well as optical imaging applications.
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