Auteur(s): Levshov D., Tran H.-N., Michel T., Cao Thi Thanh, Nguyen van Chuc, Arenal Raul, Popov Valentin, Sauvajol J.-L., Zahab A. A., Paillet M.
(Article) Publié: Physica Status Solidi B, vol. 254 p.1700251 (2017)
Ref HAL: hal-01724202_v1
DOI: 10.1002/pssb.201700251
WoS: WOS:000417609800002
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2 Citations
Résumé:
We present experimental measurements of the features of G band in individual index-identified free-standing double-walled carbon nanotubes. We examine Raman spectra of different electronic configurations of DWNTs, namely: SC@SC, SC@M, M@SC, M@M, and clearly establish that, as in SWNTs, the profile of LO G-mode of each layer is broad (narrow) when the layer is metallic (semiconducting). The dependence of G-modes on thediameter and inter-layer distance in several SC@SC, SC@M, M@SC, M@M index-identified DWNTs is reported. We find, that, independently of the metallic or semiconducting nature of the layers, the frequencies of LO and TO G-mode of the inner and outer layers shift significantly with respect to the frequencies of the same modes in the constituent SWNTs.