Fig. 7
Quantification of cellular uptake of Ag and TiO2 NPs in Neuro-2a cells as analyzed by LA-ICP-MS. Average cell uptake based on particle mass (pg/cell) and particle number (Ag NPs/cell) upon exposure to 2 μg/mL Ag NPs (a). Average signal intensity of 48Ti per cell upon exposure of cells to 2 or 10 μg/mL TiO2 NPs (b), and corresponding average relative TiO2 NP numbers per cell (c). (*) indicates a significant difference between two treatment groups as determined by student’s t-test s (p < 0.05)