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Tuning the electrical transport properties of double-walled carbon nanotubes by semiconductor and semi-metal filling

Chimowa, George and Sendova, Mariana and Flahaut, Emmanuel and Churochkin, Dmitry and Bhattacharyya, Somnath Tuning the electrical transport properties of double-walled carbon nanotubes by semiconductor and semi-metal filling. (2011) Journal of Applied Physics, 110 (12). 123708(1)-123708(5). ISSN 0021-8979

(Document in English)

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Official URL: http://dx.doi.org/10.1063/1.3670879


Manipulating the electrical properties of carbon nanotubes through semi-metal or semiconductor filling is of paramount importance in the realization of nano-electronic devices based on one dimensional composite materials. From low temperature electrical conductivity measurements of a network, of empty and filled double-walled carbon nanotubes (DWNT’s), we report a transition in electrical transport features from hopping to weakly activated conduction by HgTe filling and also semi-metallic conduction in selenium (Se) filled DWNT’s. Magneto-resistance (MR) studies of the filled DWNT’s show suppression of the hopping conduction and a signature of 3D weak localization for Se@DWNT’s at low temperatures and high magnetic fields. These results are discussed on the basis of strength of interaction between the filler material and the inner-walls of the host DWNT’s, which enhances the electronic density of states (DOS) in the material as well as the change in the property of the filler material due to constrained encapsulation.

Item Type:Article
Additional Information:Thanks to American Institute of Physics editor. The original version is available at http://jap.aip.org/ The original PDF of the article can be found at Journal of Applied Physics website: http://jap.aip.org/resource/1/japiau/v110/i12/p123708_s1
HAL Id:hal-00714382
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > New College of Florida (USA)
Other partners > University of the Witwatersrand - WITS (SOUTH AFRICA)
Laboratory name:
Deposited On:04 Jul 2012 10:44

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