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Characterization of FeGd-HN3 and FeGd-HN3-RGD2. (a, b): High resolution TEM (HR-TEM) images of FeGd-HN3 (a) and FeGd-HN3-RGD2 (b). (c): Size distribution of FeGd-HN3 (dh = 6.5 nm) and FeGd-HN3-RGD2 (dh = 8.5 nm) measured by DLS. (d): Energy dispersive X-ray spectra (EDS) of FeGd-HN3. (e): Field-dependent magnetization curves (H-M) of FeGd-HN3 and FeGd-HN3-RGD2 at 300 K. The saturation magnetization (Ms) value was determined to be 11.5 or 12.4 emu/g for FeGd-HN3 or FeGd-HN3-RGD2.
