Fig. 6

Internalization of pristine graphene oxide and pristine silver nanoparticles by J774 tumoral macrophage. a Cells with internalized pristine graphene oxide (13,000×); black arrowheads indicate pristine graphene oxide agglomerates localized close to the nucleus (b) (22,000×). c and d highlight the internalization of pristine silver nanoparticles (10,000×), in the detail, black arrowheads point to agglomerated nanoparticles localized in the vacuoles. N nucleus, V vacuole, Mt mitochondria