e-Journal of Surface Science and Nanotechnology
Online ISSN : 1348-0391
Conference -ISSS-8-
Chemical and Electronic State Analyses of Oxidizing Graphene
Kota TakaokaKei MitsuharaMasaru TakizawaShiro EntaniSeiji Sakai
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2018 Volume 16 Pages 320-323

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Abstract

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]

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