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Pressure dependence of raman modes in double wall carbon nanotubes filled with 1D tellurium

Belandria, Edgar and Millot, Marius and Broto, Jean-Marc and Flahaut, Emmanuel and Rodriguez, Fernando and Valiente, Rafael and Gonzalez, Jesus Pressure dependence of raman modes in double wall carbon nanotubes filled with 1D tellurium. (2010) Carbon, vol. 48 (n° 9). pp. 2566-2572. ISSN 0008-6223

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Official URL: http://dx.doi.org/10.1016/j.carbon.2010.03.036

Abstract

The preparation of highly anisotropic one-dimensional (1D) structures confined into carbon nanotubes (CNTs) in general is a key objective in nanoscience. In this work, capillary effect was used to fill double wall carbon nanotubes (DWCNTs) with trigonal Tellurium. The samples are characterized by high resolution transmission electronic microscopy and Raman spectroscopy. In order to investigate their structural stability and unravel the differences induced by intershell interactions, unpolarized Raman spectra of radial and tangential modes of DWCNTs filled with 1D nanocrystalline Te excited with 514 nm were studied at room temperature and high pressure. Up to 11 GPa we found a pressure coefficient of 3.7 cm−1 GPa−1 for the internal tube and 7 cm−1 GPa−1 for the external tube. In addition, the tangential band of the external and internal tubes broaden and decrease in amplitude. All findings lead to the conclusion that the outer tube acts as a protection shield for the inner tube (at least up 11 GPa). No pressure-induced structural phase transition was observed in the studied range.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://www.sciencedirect.com The original PDF of the article can be found at Carbon website : http://www.sciencedirect.com/science/journal/00086223
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Other partners > Universidad de Los Andes (VENEZUELA)
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > Universidad de Cantabria - UNICAN (SPAIN)
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Deposited By:Leila Abdelouhab

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