First produced in a lab back in 2004, graphene is essentially a single layer of pure carbon atoms bonded together in a honeycomb lattice so thin it's actually considered two-dimensional.

石墨烯最早于2004年在一个实验室中诞生，它本质上是一层由纯碳原子组成的蜂窝状晶格层，这种晶格层非常薄，实际上被认为是二维的。