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Transmission electron microscopy image of Fe3O4@Au composite MNPs (A); scanning electron microscopy image of Fe3O4@Au composite MNPs (B); The average diameter of Fe3O4@Au-C225 composite targeted MNPs (C); The zeta potential of Fe3O4@Au-C225 composite targeted MNPs (D); The UV–vis absorption spectra of Fe3O4@Au-C225 composite targeted MNPs (curve b) and Fe3O4@Au composite MNPs (curve a)(E); The hysteresis loops of Fe3O4@Au-C225 composite targeted MNPSs(F).
