Department of Chemistry2024-11-0920190169-433210.1016/j.apsusc.2019.07.2602-s2.0-85070310123http://dx.doi.org/10.1016/j.apsusc.2019.07.260https://hdl.handle.net/20.500.14288/13924Despite significant methodical improvements in the synthesis of N-doped graphene, there are still unsolved questions regarding the control of content and the configuration of nitrogen species in graphene honeycomb network. A cross-examination of X-ray photoelectron spectroscopy and Raman spectroscopy findings indicates that the nitrogen dopant amount is graphene thicknesses dependent, but the various nitrogen dopant coordination can be obtained on both double- and few-layer graphene. Characteristic defect features (D') appearing in Raman spectra upon N-doping is sensitive to nitrogen dopant coordination, graphitic-pyridinic/nitrilic species and therefore the doping level can be identified. Pyridinic and nitrilic nitrogen as primary species turn graphene to p-type semiconductor after a mild thermal treatment.Chemistry, physical and theoreticalMaterials sciencesCoatingsPhysicsCondensed matterJournal Article1873-5584486177700058Q17836