The chemical formula for graphene is often represented as Cn, where ‘n’ is the number of carbon atoms in the structure. However, it’s important to note that graphene is not defined by a fixed chemical formula like simple molecules. Instead, graphene is considered an allotrope of carbon, which means it is a different structural form of the same element.
Graphene consists of a single layer of carbon atoms arranged in a two-dimensional honeycomb lattice. This unique arrangement gives graphene its remarkable properties, such as high electrical conductivity, exceptional strength, and flexibility. Its 2D structure can be extended to create larger sheets or rolled into cylindrical forms known as carbon nanotubes, but at its core, the composition is purely carbon.
Thus, while you might see the formula Cn used to describe graphene in various scientific contexts, the fundamental aspect remains that it is a form of carbon comprised of a single layer of atoms.