Experimental and theoretical study of electronic structure of disordered MWCNTs

Experimental study of electronic structure of the initial multi-walled carbon nanotubes (MWCNTs) as well as the exposed to annealing and irradiation N-MWCNTs, was carried out by XPS and NEXAFS methods. Based on the obtained photoelectron valence band spectra and C K-edge absorption spectra, a theore...

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Bibliographic Details
Published in:Carbon (New York) 2019-11, Vol.153, p.40-51
Main Authors: Bobenko, N.G., Bolotov, V.V., Egorushkin, V.E., Korusenko, P.M., Melnikova, N.V., Nesov, S.N., Ponomarev, A.N., Povoroznyuk, S.N.
Format: Article
Language:English
Subjects:
Absorption spectra
Carbon
Chemical synthesis
Density of states
Dependence
Electron states
Electronic structure
Heat treatment
Ion beams
Multi wall carbon nanotubes
Nanotubes
Photoelectrons
Semiconductor doping
Temperature
Valence band
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Summary:Experimental study of electronic structure of the initial multi-walled carbon nanotubes (MWCNTs) as well as the exposed to annealing and irradiation N-MWCNTs, was carried out by XPS and NEXAFS methods. Based on the obtained photoelectron valence band spectra and C K-edge absorption spectra, a theoretical description of the density of electronic states (DOS) near the Fermi level was proposed to explain the dependence of the DOS and the band gap on temperature, concentration of doping atoms and various atomic configurations formed in a system during synthesis, subsequent ion-beam and heat treatment of MWCNTs. [Display omitted]
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2019.06.104