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Role of oxygen functionality on the band structure evolution and conductance of reduced graphene oxide
Ist Teil von
Chemical physics letters, 2017-06, Vol.677, p.80-86
Ort / Verlag
Elsevier B.V
Erscheinungsjahr
2017
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
[Display omitted]
•Synthesis of reduced graphene oxide using three separate reducing agents.•XPS analyses of the samples to ascertain different functional moieties.•Experimental room temperature electrical conductance of RGO samples.•DFT band structure analyses in presence of different oxygen moieties in graphene.•Calculation of theoretical mobility of graphene in presence of oxygen functional groups.
Here we report, structural and electrical transport properties of reduced graphene oxide as a function of oxygen bonding configuration. We find that mainly epoxy (COC) and carbonyl (CO) functional groups remain as major residual components after reduction using three different reducing agents. We calculate the band structure in the presence of epoxy and carbonyl groups and defects. Finally, we calculate the theoretical band mobility and find that it is less for the carbonyl with epoxy system. We correlate the distortion of linear dispersion and opening of bandgap at K-point with conductance for different graphene system in presence of oxygen moieties.