Additional file 1: of Genetic toxicity assessment of engineered nanoparticles using a 3D in vitro skin model (EpiDerm™)

Brightfield TEM micrographs of the BASF Levasil® silicon dioxide nanoparticles: 16 nm-SiO2 (a - d), 85 nm-SiO2 (e - h). (TIF 4314 kb)