Chemical and Electronic State Analyses of Oxidizing Graphene

抄録

In order to investigate the process of oxidizing graphene, the chemical and electronic states have been studied by X-ray absorption fine structure (XAFS) and photoelectron spectroscopy (PES) measurements. Single layer graphene oxide was formed on α-Al₂O₃(0001). After oxidation until 30 s, XAFS results showed a decrease of C π^* intensity and an appearance of O π^* intensity and PES results showed a similar electronic state. However, 45 s oxidation leaded to a different electronic state, and the O π^* intensity decreased for 60 s oxidation. The oxidation is thought to firstly introduce the oxygen functional groups, then to modify the graphene. [DOI: 10.1380/ejssnt.2018.320]