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Charge transfer between carbon nanotubes and sulfuric acid as determined by Raman spectroscopy

Puech, Pascal and Hu, Tao and Sapelkin, Andrei and Gerber, Iann and Tishkova, Victoria and Pavlenko, Ekaterina and Levine, Benjamin and Flahaut, Emmanuel and Bacsa, Wolfgang Charge transfer between carbon nanotubes and sulfuric acid as determined by Raman spectroscopy. (2012) Physical review B. Condensed matter and materials physics, 85 (20). 1-6. ISSN 1098-0121

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Official URL: http://dx.doi.org/10.1103/PhysRevB.85.205412

Abstract

The spontaneous interaction between sulfuric acid and carbon nanotubes is studied using Raman spectroscopy. We are able to determine the charge transfer without any additional parameter using the spectral signature of inner and outer walls of double-wall carbon nanotubes. While for the outer wall both the lattice contraction and the nonadiabatic effects contribute to the phonon shift, only the lattice contraction contributes for the inner nanotube. For the outer nanotube, we are able to separate these two contributions of the Raman G-band shift as a function of the charge transfer. We have carried out density functional theory calculations on graphene to see how different chemical species (HSO4-, H2SO4, H+) affect the electronic band structure and electron-phonon coupling. The Raman G band shift for the outer nanotube, Δω as a function of hole harge transfer per carbon atom, fC, is found to be Δω (cm−1) = (350 ± 20)fC + (101 ± 8)√fC.

Item Type:Article
Additional Information:Thanks to American Physical Society editor. The definitive version is available at http://prb.aps.org/abstract/PRB/v85/i20/e205412
HAL Id:hal-00858610
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 - INPT (FRANCE)
Université de Toulouse > Institut National des Sciences Appliquées de Toulouse - INSA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Other partners > Queen Mary University of London - QMUL (UNITED KINGDOM)
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Deposited By: cirimat webmestre
Deposited On:06 Sep 2013 09:07

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