Zinin, Pavel V. ; Velikovskii, D. Yu. ; Sharma, S. K. ; Misra, A. K. ; Filonenko, V. P. ; Anokhin, A. S. ; Kutuza, I. B. ; Bhat, Shrikant ; Riedel, Ralf (2020):
Near-Ir Raman Spectroscopy of Graphitic B–C–N Materials.
In: Glass and Ceramics, 76 (11-12), pp. 439-445. Springer Nature Switzerland AG, ISSN 0361-7610, e-ISSN 1573-8515,
DOI: 10.1007/s10717-020-00219-2,
[Article]
Abstract
Raman scattering (RS) by graphitic phases BCxN (g-BCxN), obtained by different methods, was studied using an excitation laser operating in the near-IR (NIR) range. With such excitation the most characteristic peaks for g-BCxN are 1300 cm–1 (D-peak) and 1505 cm–1 (G-peak). It is shown that the D- and G-peaks are associated with disordered graphite: the D-peak is observed because the selection rules change, and its intensity is correlated with the size of the graphite cluster sp2 in a polycrystalline graphite; the G-band is associated with thegraphite mode that is RS-active in the E2g plane. The shift of the D-peak in g-BCxN (1300 cm–1 ) as compared with its position in graphite (1355 cm–1 ) can be explained by the positional dispersion of the D-peak with excitation wavelength. The RS line centered at 1260 cm–1, which could be associated with a RS-active mode, is observed only for samples with high crystallinity and for RS spectra obtained at high pressures and high temperatures.
| Item Type: | Article |
|---|---|
| Erschienen: | 2020 |
| Creators: | Zinin, Pavel V. ; Velikovskii, D. Yu. ; Sharma, S. K. ; Misra, A. K. ; Filonenko, V. P. ; Anokhin, A. S. ; Kutuza, I. B. ; Bhat, Shrikant ; Riedel, Ralf |
| Title: | Near-Ir Raman Spectroscopy of Graphitic B–C–N Materials |
| Language: | English |
| Abstract: | Raman scattering (RS) by graphitic phases BCxN (g-BCxN), obtained by different methods, was studied using an excitation laser operating in the near-IR (NIR) range. With such excitation the most characteristic peaks for g-BCxN are 1300 cm–1 (D-peak) and 1505 cm–1 (G-peak). It is shown that the D- and G-peaks are associated with disordered graphite: the D-peak is observed because the selection rules change, and its intensity is correlated with the size of the graphite cluster sp2 in a polycrystalline graphite; the G-band is associated with thegraphite mode that is RS-active in the E2g plane. The shift of the D-peak in g-BCxN (1300 cm–1 ) as compared with its position in graphite (1355 cm–1 ) can be explained by the positional dispersion of the D-peak with excitation wavelength. The RS line centered at 1260 cm–1, which could be associated with a RS-active mode, is observed only for samples with high crystallinity and for RS spectra obtained at high pressures and high temperatures. |
| Journal or Publication Title: | Glass and Ceramics |
| Journal volume: | 76 |
| Number: | 11-12 |
| Publisher: | Springer Nature Switzerland AG |
| Uncontrolled Keywords: | B–C–N, Raman scattering, graphite, graphitic, high pressures |
| Divisions: | 11 Department of Materials and Earth Sciences 11 Department of Materials and Earth Sciences > Material Science 11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids |
| Date Deposited: | 27 Mar 2020 08:41 |
| DOI: | 10.1007/s10717-020-00219-2 |
| Official URL: | https://link.springer.com/article/10.1007/s10717-020-00219-2... |
| Projects: | Russian Science Foundation Grant, Gran Number RNF 17-12-01535 |
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