Fig. 1From: Size-dependent tissue-specific biological effects of core–shell structured Fe3O4@SiO2–NH2 nanoparticlesBiodistribution of Fe in the different tissues in the different dose groups at 6 h and 48 h post-administration of Fe@Si-NPs. C, control group; S, small-size group; M, mid-size group; L, large-size group; 6, 6 h post-dose; 48, 48 h post-dose. *Significant differences between treatment and control groups as judged by Student’s t-test (*P < 0.05)Back to article page