Graphene is a flat sheet of carbon just one atom thick—with the carbonatoms arranged in a honeycomb lattice.
石墨烯是一种只有单原子厚度的碳原子平面层——碳原子按蜂窝状晶格排列。
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First produced in a lab back in 2004, graphene is essentially a single layer of pure carbonatoms bonded together in a honeycomb lattice so thin it's actually considered two-dimensional.