Non-thermal and low-destructive X-ray induced graphene oxide reduction

V. M. Mikoushkin, A. S. Kriukov, S. Yu Nikonov, A. T. Dideikin, A. Ya Vul, O. Yu Vilkov

Результат исследований: Научные публикации в периодических изданияхстатья

Выдержка

Large-scale graphene fabrication by thermal and chemical reductions of graphene oxide has faced the problem of defect formation. To solve the problem, we have considered a physically alternative reduction process including electronic excitation followed by the oxygen group detachment from the carbon sheet without capturing a sheet of carbon atoms. Single-layer graphene oxide films were studied by photoemission spectroscopy in the course of monochromatic synchrotron X-ray radiation with in situ control of the layer thickness, chemical composition, atomic ordering, and defect concentration exactly in the modified area. The radiation flux was too low to heat the film. A non-thermal and low-destructive effect of X-ray induced graphene oxide reduction has been revealed. Transformation of the sp3 σ bonds into sp2 π ordered bonds, bandgap closing, and significant diminishing of the oxygen content (below 5 at. %) have been observed without any signs of defects in the photoemission spectra. The effective cross section of the oxygen group detachment induced by a soft X-ray photon (hν = 130 eV) was estimated to be σ∗ ∼ 3 × 10-18 cm2. A reduced single-layer graphene oxide with a narrow bandgap (0.4 - 0.8 eV) attractive for many applications was obtained, as well as almost pure graphene.

Язык оригиналаанглийский
Номер статьи175303
ЖурналJournal of Applied Physics
Том124
Номер выпуска17
DOI
СостояниеОпубликовано - 2018

Отпечаток

graphene
oxides
x rays
detachment
defects
oxygen
photoelectric emission
carbon
radiation
closing
oxide films
chemical composition
synchrotrons
heat
fabrication
cross sections
photons
electronics
spectroscopy
excitation

Предметные области Scopus

  • Физика и астрономия (все)

Цитировать

Mikoushkin, V. M., Kriukov, A. S., Nikonov, S. Y., Dideikin, A. T., Vul, A. Y., & Vilkov, O. Y. (2018). Non-thermal and low-destructive X-ray induced graphene oxide reduction. Journal of Applied Physics, 124(17), [175303]. https://doi.org/10.1063/1.5047045
Mikoushkin, V. M. ; Kriukov, A. S. ; Nikonov, S. Yu ; Dideikin, A. T. ; Vul, A. Ya ; Vilkov, O. Yu. / Non-thermal and low-destructive X-ray induced graphene oxide reduction. В: Journal of Applied Physics. 2018 ; Том 124, № 17.
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Mikoushkin, VM, Kriukov, AS, Nikonov, SY, Dideikin, AT, Vul, AY & Vilkov, OY 2018, 'Non-thermal and low-destructive X-ray induced graphene oxide reduction', Journal of Applied Physics, том. 124, № 17, 175303. https://doi.org/10.1063/1.5047045

Non-thermal and low-destructive X-ray induced graphene oxide reduction. / Mikoushkin, V. M.; Kriukov, A. S.; Nikonov, S. Yu; Dideikin, A. T.; Vul, A. Ya; Vilkov, O. Yu.

В: Journal of Applied Physics, Том 124, № 17, 175303, 2018.

Результат исследований: Научные публикации в периодических изданияхстатья

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AU - Vul, A. Ya

AU - Vilkov, O. Yu

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Mikoushkin VM, Kriukov AS, Nikonov SY, Dideikin AT, Vul AY, Vilkov OY. Non-thermal and low-destructive X-ray induced graphene oxide reduction. Journal of Applied Physics. 2018;124(17). 175303. https://doi.org/10.1063/1.5047045