Cellular uptake of methanol C60. (A). Phase contrast image of a MDA MB231 cell which has internalized a C60 cluster. Intracellular C60 retains its PL signature. Scale bar is 20 μm. (B). Confocal microscopy of internalized C60 aggregates (red) identified with arrows. Methanol C60-treated MCF10A cells were plated on collagen coated chamber slides, fixed, counterstained with FITC-phalloidin. A compiled 3-dimensional projection of optically sectioned z-stack is shown. Scale bar is 5 μm.