▎ 摘　　要

Controlled oxidation and reduction are both responsible in determining the distribution of functional groups in graphene derivatives. These functional groups are accountable for showing different types of electrical con-ductivity in reduced graphene oxide (rGO) and nitrogen-doped rGO (N-rGO). The study reports a new approach to obtain different electronic grades of N-rGO by simply treating rGO with ammonia solution at different tem-peratures. Using Hall measurements, the electrical properties of rGO and N-rGO are examined, and their con-ductivity type, sheet carrier density, and resistivity are calculated. The presence of oxygen-containing functional groups causes p-type conductivity in rGO but N-rGO possesses a completely different set of electronic properties due to differently aligned nitrogen-atoms in the exfoliated layers. The amount of ammonia used and the tem-perature at which it is synthesised are both important in the synthesis of N-rGO. Complete n-type conductivity or compensated n-type conductivity is observed in different types of N-rGOs.