Figure 1From: In vitro toxicity of different-sized ZnO nanoparticles in Caco-2 cellsMicroscopy characterizations of ZnO NPs. TEM images of an average (A) 26-nm ZnO NP, (B) 62-nm ZnO NP, and (C) 90-nm NP. Ranges (D) from 15 to 30 nm for a nanosphere, (E) from 30 to 70 nm for a nanorod, and (F) from 60 to 100 nm for a nanorod. TEM scale bars: (A) 50 nm, (B) 100 nm, and (C) 200 nm.Back to article page