Research Article

Gallium-68 Labeled Iron Oxide Nanoparticles Coated with 2,3-Dicarboxypropane-1,1-diphosphonic Acid as a Potential PET/MR Imaging Agent: A Proof-of-Concept Study

Figure 3

(a) Intensity weighted hydrodynamic radii size distribution of Fe3O4-DPD MNPs; (b) dependence of zeta potential of Fe3O4 and Fe3O4-DPD MNPs on the change of pH.
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(b)