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

Karmakar, Sukanta and Sharma, Surinder M and Teredesai, PV and Muthu, DVS and Govindaraj, A and Sikka, SK and Sood, AK (2003) Structural changes in single-walled carbon nanotubes under non-hydrostatic pressures: x-ray and Raman studies. In: New Journal of Physics, 5 . p. 143.

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Abstract

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.

Item Type:	Journal Article
Publication:	New Journal of Physics
Publisher:	Institute of Physics
Additional Information:	Copyright of this article belongs to Institute of Physics.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	24 Aug 2011 06:44
Last Modified:	24 Aug 2011 06:44
URI:	http://eprints.iisc.ac.in/id/eprint/40212

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