Graphene or its oxide small enough to be almost invisible (== does not have much of color in solution) must be very small. It will mess with cellular machinery. Cross the blood-brain barrier. Literally cut? Really, I've never seen any such talk in nanotech papers on bioactivity. Read or browsed plenty.
Larger sized molecules will produce a colored solution, and that cannot be hidden. Be skeptical.
I am a skeptical dinosaur.
Graphene or its oxide small enough to be almost invisible (== does not have much of color in solution) must be very small. It will mess with cellular machinery. Cross the blood-brain barrier. Literally cut? Really, I've never seen any such talk in nanotech papers on bioactivity. Read or browsed plenty.
Larger sized molecules will produce a colored solution, and that cannot be hidden. Be skeptical.