In situ Raman investigations of single-wall carbon nanotubes pressurized in diamond anvil cellObraztsova, E. D., Lotz, H. T., Schouten, J. A., Kooi, M. E., Osadchy, A. V., Kuznetsov, V. L. & Zaikovskii, V. I., 1999, In : AIP Conference Proceedings. 486, 1, p. 473-482 10 p.
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The Raman spectra of single-wall carbon nanotubes under the pressures up to 10 GPa have been measured in situ in diamond anvil cell. The “breathing” mode was clearly seen at pressures below 2 GPa and disappeared at higher pressures. The splitting of TO mode was kept at all steps of pressurizing. This mode shifted from the position 1592 cm−1 (at ambient pressure) toward high frequencies almost linearly with the pressure. The shift rate (4.9 cm−1/GPa) appeared to be very close to that of graphite. The irreversible broadening and overlapping of the split components of TO mode at pressures above 2.5 GPa have been observed. A polymerization of nanotubes inside ropes followed by the graphite needles formation is discussed as a possible mechanism of the tube structure transformation under the pressure
|Number of pages||10|
|Journal||AIP Conference Proceedings|
|Publication status||Published - 1999|