XII International Symposium ''Optics and Biophotonics'' (Saratov Fall Meeting 2024), Saratov, September 23-27, 2024
Physical science of materials

Correlation of X-ray, TEM, and Raman methods in the study of orientational disorder in multi-walled carbon nanotubes

N. G. Bobenko, V. E. Egorushkin, A. N. Ponomarev

Institute of Strength Physics and Materials Science, Siberian Branch of the Russian Academy of Sciences, Tomsk

Abstract: The effect of mechanical grinding on the structure of multi-walled carbon nanotubes (MWCNTs) with diameters of 7 nm and 18 nm was investigated using X-ray diffraction (XRD), Raman spectroscopy, and transmission electron microscopy (TEM). The results demonstrated that for 7-nm nanotubes, grinding does not cause significant changes in lattice parameters or crystallite sizes, indicating preservation of the original structure. In contrast, 18-nm samples exhibited substantial structural changes, including reduced interlayer spacing and peak splitting in Raman spectra, suggesting the formation of torsional deformations due to layer rotations relative to one another. The integrated approach combining XRD, TEM, and Raman spectroscopy revealed correlations between grinding conditions and structural changes, which are crucial for tailoring MWCNT properties for various applications such as catalysis and composites.

Keywords: multi-walled carbon nanotubes, microstructure, Raman spectroscopy, TEM, X-ray diffraction.

Received: 19.12.2024
Revised: 19.12.2024
Accepted: 19.12.2024

DOI: 10.61011/JTF.2025.05.60281.452-24

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