Figure 4

(a) Schematic models of the DGPN, DG, and PG structures in column (a). (b–f) Comparison between XPS spectra in F 1s (b), N 1s (c), C 1s (d), S 2s (e), Au 4f (f) regions of DGPN, DG, and PG structures respectively. (g) Schematic model of the single layer pristine graphene. (h) Chemical structure (top) and schematic model (bottom) of the PEDOT:PSS polymer. (i) Chemical structure of the TFSA dopant molecule. (j) Chemical structure of the AuCl3 dopant molecule.