Fig. 2
Characterization of the Fe3O4-PEG-CD56/Avastin@Ce6 NPs. (A) TEM image of the synthesized Fe3O4-PEG-CD56/Avastin@Ce6 NPs. (B) Size distribution of the Fe3O4-PEG-CD56/Avastin@Ce6 NPs determined from the TEM images. (C) UV-visible absorption spectrum. (D) FTIR spectrum of samples (a: Fe3O4 NPs, b: Fe3O4-PEG NPs, c: Fe3O4-PEG-CD56/Avastin NPs, and d: Fe3O4-PEG-CD56/Avastin@Ce6 NPs). (E) T2-weighted MR images of the Fe3O4-PEG-CD56/Avastin@Ce6 nanoprobes in aqueous solutions at various Fe concentrations. (F) T2 relaxation rates of the Fe3O4-PEG-CD56/Avastin@Ce6 nanoprobes