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Pressure Behaviour of Single Wall Carbon Nanotube Bundles and Fullerenes: A Raman Study

1999; Wiley; Volume: 215; Issue: 1 Linguagem: Inglês

10.1002/(sici)1521-3951(199909)215

1521-3951

Anil K. Sood, Pallavi V. Teresdesai, D. V. S. Muthu, Rahul Sen, A. Govindaraj, C. N. R. Rao,

Fullerene Chemistry and Applications

physica status solidi (b)Volume 215, Issue 1 p. 393-401 Original Paper Pressure Behaviour of Single Wall Carbon Nanotube Bundles and Fullerenes: A Raman Study A. K. Sood, A. K. Sood Department of Physics, Indian Institute of Science, Bangalore–560 012, IndiaSearch for more papers by this authorPallavi V. Teresdesai, Pallavi V. Teresdesai Department of Physics, Indian Institute of Science, Bangalore–560 012, IndiaSearch for more papers by this authorD. V. S. Muthu, D. V. S. Muthu Department of Physics, Indian Institute of Science, Bangalore–560 012, IndiaSearch for more papers by this authorRahul Sen, Rahul Sen Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur Campus, Jakkur P.O., Bangalore–560 064, IndiaSearch for more papers by this authorA. Govindaraj, A. Govindaraj Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur Campus, Jakkur P.O., Bangalore–560 064, IndiaSearch for more papers by this authorC. N. R. Rao, C. N. R. Rao Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur Campus, Jakkur P.O., Bangalore–560 064, IndiaSearch for more papers by this author A. K. Sood, A. K. Sood Department of Physics, Indian Institute of Science, Bangalore–560 012, IndiaSearch for more papers by this authorPallavi V. Teresdesai, Pallavi V. Teresdesai Department of Physics, Indian Institute of Science, Bangalore–560 012, IndiaSearch for more papers by this authorD. V. S. Muthu, D. V. S. Muthu Department of Physics, Indian Institute of Science, Bangalore–560 012, IndiaSearch for more papers by this authorRahul Sen, Rahul Sen Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur Campus, Jakkur P.O., Bangalore–560 064, IndiaSearch for more papers by this authorA. Govindaraj, A. Govindaraj Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur Campus, Jakkur P.O., Bangalore–560 064, IndiaSearch for more papers by this authorC. N. R. Rao, C. N. R. Rao Jawaharlal Nehru Center for Advanced Scientific Research, Jakkur Campus, Jakkur P.O., Bangalore–560 064, IndiaSearch for more papers by this author First published: 03 September 1999 https://doi.org/10.1002/(SICI)1521-3951(199909)215:1 3.0.CO;2-8Citations: 46AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract We shall discuss our recent high pressure Raman studies on single wall carbon nanotube (SWNT) bundles and compare them with pressure-induced amorphous and polymeric phases of crystalline C60 and C70. Our high pressure Raman studies on SWNT bundles carried out upto 25.9 GPa show that the intensities of both the radial modes (ω ≈︂ 170 cm—1) as well as tangential modes (around 1590 cm—1) decrease significantly with pressure, so much that the radial modes cannot be observed beyond 2.6 GPa. Most interestingly, the frequency of the dominant tangential mode increases upto 11 GPa, then decreases till 16 GPa and again increases. Raman spectra were resolved into four modes upto 10 GPa beyond which only one or two modes could be fitted to the recorded spectra. The pressure-softening of the mode between 11 and 16 GPa as well as other features of the Raman spectra are reversible in the decreasing pressure cycle. These results, though not understood at present, can be associated with the distortion of the circular cross-section of the tubes in the bundle, eventually leading to a possible transition of the SWNT bundle to graphite like carbon at 11 GPa which is completed at 16 GPa. This transition is reversible on decompression. Citing Literature Volume215, Issue1September 1999Pages 393-401 RelatedInformation