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. 2020 Nov 5;15:8623–8639. doi: 10.2147/IJN.S275655

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© 2020 Tsai et al.

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Characterization of PSPps encapsulated with truncated octahedral Fe₃O₄ nanoparticles (IONPs) in the hydrophobic compartment (IONPs-PSPps NPs). (A) TEM image of IONPs-PSPps NPs. (B) Hysteresis loops of IONPs (blue curve) and IONPs-PSPps NPs (orange curve) at 300 K. The insets are enlarged hysteresis curves, and B_R and H_C correspond to their remnant magnetization and coercivity, respectively. Saturation magnetizations (M_S) were calculated based on the weight of Fe₃O₄. Calculated relaxivity (r₂) values of (C) IONPs and (D) IONPs-PSPps NPs based on the T₂ relaxation rate versus iron ion concentration.