Figure 1: Morphology of CoFe₂O₄ and CoFe₂O₄@MIL-100(Fe).

TEM images of (A,B) CoFe₂O₄ and (C,D) CoFe₂O₄@MIL-100(Fe); inset: size distributions from dynamic light scattering. The TEM images indicate that both CoFe₂O₄ and CoFe₂O₄@MIL-100(Fe) MNPs exhibited excellent nanoscale and mesoporous properties.