X-ray absorption spectroscopy of graphite oxides
ORAL
Abstract
We have investigated electronic structures of graphite oxide using x-ray absorption spectroscopy at carbon and oxygen K-edges. Unoccupied states such as $\pi ^{\ast }$ and $\sigma ^{\ast }$ states originating from sp$^{2}$ hybridization in graphite are also visible in the graphite oxide, even though the graphite oxide experiences a severe oxidation. Additional electronic states of the graphite oxide compared to that of pure graphite are ascribed to the functional groups such as epoxide, carboxyl, and hydroxyl groups that are present in the graphite oxide.
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