Fig. 5From: Biodistribution of single and aggregated gold nanoparticles exposed to the human lung epithelial tissue barrier at the air-liquid interface a Bio-distribution of single and aggregated AuNPs 24 h post-exposure. b Uptake kinetics after exposure to single and aggregated AuNPs at a concentration of 300 ng/cm2; significant differences of intracellular gold were found between single and aggregated AuNPs at 4 h (*) and for aggregated AuNPs after 4 and 24 h post-exposure (#), p < 0.05 was considered statistically significant. c Translocation kinetics after exposure to single and aggregated AuNPs at a concentration of 300 ng/cm2 Back to article page