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RAMAN SPECTROSCOPY ON ELECTROCHEMICALLY DOPED CARBON NANOTUBES

P. M. Rafailov1,2,* , C. Thomsen1

Affiliation

  1. Institut für Festkörperphysik der Technischen Universität Berlin, Sekr. PN 5-4, Hardenbergstr. 36, D-10623 Berlin, Germany
  2. Institute of Solid State Physics, Bulgarian Academy of Sciences, 72 Tzarigradsko Chaussee Blvd., 1784 Sofia, Bulgaria

Abstract

We studied the Raman response of electrochemically doped single-walled carbon nanotubes (SWNT), using different electrolyte solutions and excitation energies in the range 1.92 - 2.54 eV. The frequency shifts of the high-energy stretching graphite-like mode (HEM) and the disorder (D) mode were examined as a function of the doping level. We show that the actuation properties of nanotubes (strain vs. doping) can be determined from the HEM shift. The results, considered in the framework of a double-resonant model for Raman scattering, give evidence about the doping-induced shift of whole regions of phonon dispersion branches..

Keywords

Raman spectroscopy, Phonons, Doping, Carbon nanotubes.

Submitted at: Dec. 9, 2004
Accepted at: Jan. 26, 2005

Citation

P. M. Rafailov, C. Thomsen, RAMAN SPECTROSCOPY ON ELECTROCHEMICALLY DOPED CARBON NANOTUBES, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 1, pp. 461-464 (2005)