fig2

Figure 2. TEM images of citrate-modified Fe3O4 NPs at low (A), middle (B), and high magnifications (C). Hydrodynamic size distribution of citrate-modified Fe3O4 NPs (D).
Figure 2. TEM images of citrate-modified Fe3O4 NPs at low (A), middle (B), and high magnifications (C). Hydrodynamic size distribution of citrate-modified Fe3O4 NPs (D).
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