Figure 9From: Uptake and fate of surface modified silica nanoparticles in head and neck squamous cell carcinomaIntracellular long time retention of nanoparticles. Transmission electron microscopy pictures of UMB-SCC 745 after nanoparticle incubation over a time period of 15 days. A-C) 2, 9 and 12 days after incubation of Ru@SiO2-OH nanoparticles. D-F) 2, 9 and 12 days after incubation of Ru@SiO2-NH2 nanoparticles. Scale bars for A-E) = 5 μm and for F) = 0.5 μm.Back to article page