Fig. 7

TEM micrographs of (a) Fe₃O₄_A (cuboctahedral) and (b) Fe₃O₄_B (octahedral) nanoparticles. Large scale bars: 100 nm. Zoom scale bars: 10 nm, (c) a representative Electron Diffraction (ED) pattern corresponding to sample Fe₃O₄_A and (d) M (H) curves of both samples at room temperature