FIG. 7.
Contact between A5 cells and INT-WS2. (A) Environmental scanning electron microscopy (ESEM) images (using backscattered (BSE) and secondary (SE) detectors as indicated in the black box) of an A5 cell grown in a medium with 35.2 μg/mL INT-WS2. The EDS of areas 1 (white rectangle, control) and 2 (black rectangle, nanotube aggregate) are shown in panel (B). The compounds, tungsten (W, M, and L shells) and sulfur (S and K shells), show peaks in the EDS of (B2)—area of cell in contact with nanotube but do not appear in (B1)—control area of cell. EDS, energy dispersive X-ray spectroscopy.