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Polyetherimide-grafted Fe<sub>3</sub>O<sub>4</sub>@SiO<sub>2</sub> nanoparticles as theranostic agents for simultaneous VEGF siRNA delivery and magnetic resonance cell imaging

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Figure

Figure 1 schematic illustrating the preparation of Fe3O4@siO2/PeI/VegF shrNa nanocomposites for gene delivery
Figure 2 Morphology of Fe3O4@siO2 and Fe3O4@siO2/PeI/VegF shrNa nanocomposites. Notes: TeM images of (A) Fe3O4@siO2 nanoparticles and (B) Fe3O4@siO2/PeI/VegF shrNa nanocomposites
Figure 3 sTeM and haaDF-sTeM-eDs mapping images of Fe3O4@siO2 nano-particles O, si, and Fe.Notes: (A) sTeM of Fe3O4@siO2 nanoparticles (inset: higher-magnification image of sTeM)
Figure 5 Magnetization curves of Fe3O4@siO2 and Fe3O4@siO2/PeI measured at room temperature.Notes: Inset: magnetic targeting under an external magnet, (A) Fe3O4@siO2 and (B) Fe3O4@siO2/PeI.Abbreviation: PeI, polyethylenimine.
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