Graphene is a form of the chemical element carbon.
Well-known forms of carbon include the world’s hardest material,
diamond, and the soft black material known as the “lead” in a
pencil, which is graphite. Graphite can be visualized as layers of
carbon atoms stacked together in sheets with each sheet resembling
a hexagonally woven chicken wire fence or a very thin honeycomb.
Graphene is to all intents and purposes a single sheet from one of
those stacks. It is thus one of the thinnest materials known, an
atomic monolayer of carbon atoms.
