Structural changes in single-walled carbon nanotubes under non-hydrostatic pressures: x-ray and Raman studies

Details Structural changes in single-walled carbon nanotubes under non-hydrostatic pressures: x-ray and Raman studies Structural changes in single-walled carbon nanotubes under non-hydrostatic pressures: x-ray and Raman studies

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003njph....5..143k&link_type=abstract

New Journal of Physics, Volume 5, Issue 1, pp. 143 (2003).

Physics

8

Scientific paper

Using in situ x-ray diffraction and Raman scattering techniques, we have investigated the behaviour of single-walled carbon nanotubes bundles under non-hydrostatic pressures. It is seen that the diffraction line corresponding to the two-dimensional triangular lattice in the bundles is not reversible for pressures beyond 5 GPa, in sharp contrast to earlier results under hydrostatic pressure conditions. Most interestingly, radial breathing and tangential Raman modes of the pressure-cycled samples from 21 and 30 GPa match very well with those of the starting sample. Raman and x-ray results put together clearly suggest that the ordering of tubes in the bundles is only marginally regained with a very short coherence length on decompression.

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