@article{oai:repo.qst.go.jp:00049542,
 author = {Takaoka, Kota and Mitsuhara, Kei and Takizawa, Masaru and 圓谷, 志郎 and 境, 誠司 and 圓谷 志郎 and 境 誠司},
 journal = {e-Journal of Surface Science and Nanotechnology},
 month = {Jul},
 note = {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 sapphire(0001). After oxidation until 30s, XAFS results showed a decrease of C pi* intensity and an appearance of O pi* intensity and PES results showed a similar electronic state. However, 45s oxidation leaded to a different electronic state, and the O pi* intensity decreased for 60s oxidation. The oxidation is thought to firstly introduce the oxygen functional groups, then to modify the graphene.},
 pages = {320--323},
 title = {Chemical and Electronic State Analyses of Oxidizing Graphene},
 volume = {16},
 year = {2018}
}