Figure 4From: Mechanism of cellular uptake of genotoxic silica nanoparticles (a) TEM image of A549 cellular uptake of silica NPs after incubation with 100 μg/ml for 30 mins at 4°C. (b) Higher magnification image of the area indicated by the box in (a). (c) EDX spectrum from the silica NP containing region of the A549 cell indicated by the box in (b).Back to article page