Charge distribution in graphene from quantum calculation Project supported by the National Natural Science Foundation of China (Grant Nos. 11764027 and 11364025) and the Chinese Scholarship Council (Grant No. 201408625041). |
(color online) Carbon atoms with (a) chain, (b) round, (c) rectangle, (d) hexagonal shape, and (e) asymmetrical geometry graphene sheet. The number indicates the charges on the atoms and color refers to electrostatic potential: blue represents positive charge and red refers to negative charge. |