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A5 cells morphology is unaffected by the nanoparticles. Light microscopy (A, B) and SEM (C, D) images of A5 cells with INT-WS2. (A) Second day from culture. (B) Fourth day from culture. Arrow in (A) indicates a single nanotube, whereas arrow in (B) most likely points to a platelet of WS2. Scale bars: (A, B) 100 μm, (C) 20 μm, (D) 5 μm. SEM, scanning electron microscopy.
