Quantification of Internalized Silica Nanoparticles via STED Microscopy

Figure 6

SEM micrographs of human type II alveolar epithelial cells (A549) incubated with Si-25-FD and Si-85-FD in serum-containing medium. No change in cell morphology was observed after exposure to 1, 10, or 100 μg mL⁻¹ SNPs for 5 h. Untreated cells serve as controls (ctr).

(a)

(b)