Figure 1 | Scientific Reports

Figure 1

From: Effective hole conductivity in nitrogen-doped CVD-graphene by singlet oxygen treatment under photoactivation conditions

Figure 1

Schematic representation of the N-doped graphene as prepared and after light irradiation under ambient conditions. The blue spheres represent nitrogen atoms. The three different C–N bonding configurations inserted into the graphene network are evidenced in the as prepared G:N, as well as the typical carbon vacancy (blue area) and the Stone–Wales ( yellow area) defects. Following light irradiation, two new functionalities are introduced: Pyridine N-oxide and Pyridone. Among the three different tautomeric forms of pyridone it is emphasized the net charge separation in zwitterion pyridone-III as well as in pyridine N-oxide, thus resulting in a more p-doped.

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