I want to know the instrument I need to use to characterize the graphene oxide or reduced graphene to get the bandgap, HOMO, LUMO and binding energy.
Hello Dr. Alfred, it is better to measure XPS, cycluc voltammogram...and UV-Vis-NIR spectra...please refer to related references
Optical bandgap: UV-Vis or ellipsometry
Electronic bandgap: STS (Scanning tunneling spectroscopy)
HOMO binding energies: UPS or EELS
LUMO energies: IPE (Inverse photoemission)
This paper is useful to understand this subject.
The precise role of UV exposure time in controlling the orbital transition energies, optical and electrical parameters of thermally vacuum evaporated Se 50 Te 50 thin film
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