Preparation and characteristics of Fe3O4 magnetic thin films plated on hollow glass spheres

The surface of hollow glass spheres was deposited with a layer of Fe3O4 film in the open air without using ultrasound and toxic reducing reagent NaNO2; the magnetic films of Fe3O4 were characterized by XRD, SEM and EDS. The intactness of the films was remarkably affected by temperature; it is favorable for the hollow glass spheres to be encapsulated completely by the Fe3O4 magnetic films as plating temperature increased at pH 6.7. The films exhibited ferromagnetic behavior.