Galvanostatic Deposition of Magnetite Nanoparticles for Biomedical Applications: Simple Preparation and Surface Modification with Polyethylenimine and Polyvinyl Chloride

In this work, PEI and PVC grafted Ni doped superparamagnetic iron oxide (i.e. PEI/Ni-SPIOs and PVC/Ni-SPIOs) were synthesized on steel sheet though galvanostatic (constant current) deposition mode. Structural and morphological properties of the fabricated PEI/Ni-SPIOs and PVC/Ni-SPIOs samples were studied and the results indicated the successful synthesis of polymer grafted iron oxide nanoparticles. The size of prepared particles was about 20 nm. Thermogravimetric data showed 7.2 wt % PEI and 6 wt % PVC coated onto the surface of Ni-SPIOs particles. The magnetite crystal phase of samples was proved via XRD and IR data. In addition, the obtained results from vibrating sample magnetometer analysis showed that the fabricated samples exhibit low residual magnetization values (i.e. Mr=0.95 and Mr=0.53 emu/g, respectively, for PVC and PEI grafted Ni-SPIOs), which revealed their suitability for biomedical uses.