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. 2020 Jul 7;15:4811–4824. doi: 10.2147/IJN.S253184

Figure 1.

Figure 1

(A) UV-Vis absorption spectra of Fe3O4NPs and Fe3O4@AuNPs after the first (Fe3O4@Au1) and second (Fe3O4@Au2) covering steps; (B) zeta potential of the final Fe3O4@AuNPs; (C) typical TEM image of Fe3O4@AuNPs; and (D) the corresponding elemental composition of O, Fe and Au measured via EDX.