Fig. 2
From: Extremely stable graphene electrodes doped with macromolecular acid
Temperature dependency and doping mechanism. a Rsh changes of PFSA and HNO3-doped graphene at various Ta. b Potential mapping of pristine, and PFSA-doped graphene annealed at various Ta. The error bars represent the s.d. of multiple measurement results. c Calculated electrostatic potential of the most stable configuration of PFSA-doped graphene (inset: difference in work function between pristine and PFSA-doped graphene). d Configuration of PFSA-doped graphene (top) top view, and (bottom) side view. Spheres: blue = oxygen, silver = sulfur, cyan = hydrogen, orange = fluorine, yellow = carbon. The isosurface of the charge density distribution difference is also shown in the figure. Isosurface level is 0.005e Å-3
