Safety Evaluation of Engineered Nanomaterials for Health Risk Assessment: An Experimental Tiered Testing Approach Using Pristine and Functionalized Carbon Nanotubes
Figure 3
Phase contrast micrographs showing A549 cell cultures. (a) Untreated cells. (b–f) Bundle-like agglomerates covering cell surface after 24 h exposure to 100 μg/mL. (b) MWCNTs, (c) MW-COOH, (d) MW-NH2, or (e) CB; (f) absence of agglomeration after exposure to SiO2 (100 μg/mL). Objective magnification: 32x (4).
