Figure 1From: Size-regulated group separation of CoFe2O4 nanoparticles using centrifuge and their magnetic resonance contrast propertiesTEM images of the four MNP groups. The TEM images show that the particles were well dispersed and size-regulated according to the group. The mean diameters for the four groups were 24.2 ± 3.6, 20.0 ± 3.6, 15.8 ± 3.6, and 10.5 ± 2.4 nm, for groups a to d, respectively.Back to article page