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Electronic and vibrational excitations in carbon nanotubes |
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| Authors: | G. Chiarello E. Maccallini A. Cupolillo E. Colavita L. Petaccia S. Lizzit |
| Affiliation: | a Istituto Nazionale di Fisica della Materia, Unitá della Calabria Dipartimento di Fisica, Universitá della Calabria, I-87036 Rende (CS), Italy b Sincrotrone Trieste S.C.p.A., S.S. 14 Km163,5, in Area Science, Park, 34012 Trieste, Italy c Sincrotrone Trieste S.C.p.A. and Lab. TASC-INFM, S.S. 14 Km163,5, in Area Science, Park, 34012 Trieste, Italy |
| Abstract: | We investigated the electronic and vibrational properties of single wall carbon nanotubes by reflection electron energy loss and X-ray absorption spectroscopies. We report on single particle excitations measured at the C-1s edge and on collective excitations of the valence band region. The comparison between the two techniques allows us to locate empty electronic states of the carbonaceous sample. Loss spectra taken in the infrared region reveal two loss features at 90 and 170 meV assigned to the excitation of optical phonon modes. |
| Keywords: | A. Carbon nanotubes Graphite C. Electron energy loss spectroscopy D. Electronic properties |
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