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. Author manuscript; available in PMC: 2020 Sep 3.
Published in final edited form as: ACS Appl Mater Interfaces. 2018 Oct 4;10(41):34954–34964. doi: 10.1021/acsami.8b12355

Figure 7.

Figure 7.

In vivo T1-weighted MR images (a) and signal intensity (b) of HeLa tumors after intravenous injection of the NOTA–FA–FI–PEG–PEI–Ac–Mn3O4 NPs or the NOTA–FI–PEG–PEI–Ac–Mn3O4 NPs (500 mg Mn, in 0.2 mL saline) at different time points. Tumors are indicated by white arrows.