Zinin, Pavel V. and Velikovskii, D. Yu. and Sharma, S. K. and Misra, A. K. and Filonenko, V. P. and Anokhin, A. S. and Kutuza, I. B. and Bhat, Shrikant and Riedel, Ralf (2020):
Near-Ir Raman Spectroscopy of Graphitic B–C–N Materials.
In: Glass and Ceramics, (11-12), 76. Springer Nature Switzerland AG, pp. 439-445, ISSN 0361-7610, e-ISSN 1573-8515,
DOI: 10.1007/s10717-020-00219-2,
[Online-Edition: https://link.springer.com/article/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.

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