Visible and near ultraviolet photocurrent generation in carbon nanotubes

M. De Crescenzi, F. Tombolini, M. Scarselli, S. Del Gobbo, E. Speiser, P. Castrucci*, M. Diociaiuti, S. Casciardi, E. Gatto, M. Venanzi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


Multiwall carbon nanotubes are found to generate photocurrent in the visible and near ultra violet spectral range using a photoelectrochemical technique. Peaks in the photocurrent are observed at excitation energies in the visible region. Their electron energy loss spectra exhibit the π plasmon feature, typical of graphite layers, and a peak at lower energy. Features at energies between 0 and 4 eV have been already observed for single wall carbon nanotubes and ascribed to interband electronic transitions due to the reduced dimensionality of these systems. The present measurements suggest that the usual identification of multiwall carbon nanotubes electronic density of states with that of graphite layers is not sufficient and more theoretical investigations are necessary to shed light on this point.

Original languageEnglish (US)
Pages (from-to)2810-2813
Number of pages4
JournalSurface Science
Issue number13
StatePublished - Jul 1 2007
Externally publishedYes


  • Carbon nanotubes
  • Electron energy loss spectroscopy (EELS)
  • Photocurrent measurements
  • Raman scattering spectroscopy

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Materials Chemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces


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