A single carbon layer of the @[email protected] structure, describing its nature by analogy to a polycyclic aromatic hydrocarbon of quasi infinite size.
Previously, descriptions such as @[email protected] layers, carbon layers or carbon sheets have been used for the term graphene. Because @[email protected] designates that modification of the @[email protected] carbon, in which planar sheets of carbon atoms, each atom bound to three neighbours in a honeycomb-like structure, are stacked in a three-dimensional regular order, it is not correct to use for a single layer a term which includes the term @[email protected], which would imply a three-dimensional structure. The term graphene should be used only when the reactions, structural relations or other properties of individual layers are discussed.
PAC, 1995, 67, 473. (Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)) on page 491 [Terms] [Paper]