Due to the properties of bio-compatibility, biological stability, non-toxic and the characteristics of magnetic targeting, the thermal seed materials(Fe3O4@CNTs) and gold magnetic nano materials(Au@Fe3O4), which were both prepared on the basics of Fe3O4, have been widely used in the treatment of tumors and other bio-medical fields. Among them, the thermal seed materials (Fe3O4@CNTs) are widely used in tumor hyperthermia, while the gold magnetic nano materials(Au@Fe3O4) used in tumor chemotherapy as the targ...