Correlation of X-ray, TEM and Raman in the ground MWCNTs stacking disorder investigation
Nadezhda Bobenko1, Valery Egorushkin 1, Alexander Ponomarev 1
Institute of Strength Physics and Materials Science, Tomsk, Russia
Abstract
The structural properties of multi-walled carbon nanotubes (MWCNTs) with diameters of 7 nm and 18 nm were investigated before and after grinding. X-ray diffraction, Raman spectroscopy, TEM and Fast Fourier Transform (FFT) patterns were used to analyze the structural changes in MWCNTs. In addition to experimental studies, simulations of structures containing Stone-Wales defects, two vacancies and stacking disorder were conducted. Corresponding structure factors, which matched the observed FFT patterns, were calculated. The results indicate that MWCNTs with smaller diameters, were initially highly curved and undergo minimal structural changes upon grinding. In contrast, larger diameter MWCNTs indicates significant structural transformations. They are rotation of the outer layer and formation of regions with different stacking disorder.
Speaker
Bobenko Nadezhda
Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences (ISPMS SB RAS)
Russia
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