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 pi 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. (c) 2006 Elsevier B.V. All rights reserved.

De Crescenzi, M., Tombolini, F., Scarselli, M.a., Gobbo, S., Speiser, E., Castrucci, P., et al. (2006). Visible and near ultraviolet photocurrent generation in carbon nanotubes. In Surface Science (pp.2810-2813). AMSTERDAM : ELSEVIER SCIENCE BV [10.1016/j.susc.2006.12.046].

Visible and near ultraviolet photocurrent generation in carbon nanotubes

SCARSELLI, MANUELA ANGELA;CASTRUCCI, PAOLA;GATTO, EMANUELA;VENANZI, MARIANO
2006-12-22

Abstract

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 pi 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. (c) 2006 Elsevier B.V. All rights reserved.
International Conference on NANO-Structures Self Assembling
Aix en Provence, FRANCE
JUL 02-06, 2006
De Crescenzi M./Berbezier I.
Rilevanza internazionale
contributo
5-giu-2006
22-dic-2006
Settore FIS/03 - FISICA DELLA MATERIA
English
Carbon nanotubes; Electron energy loss spectroscopy (EELS); Photocurrent measurements; Raman scattering spectroscopy
Intervento a convegno
De Crescenzi, M., Tombolini, F., Scarselli, M.a., Gobbo, S., Speiser, E., Castrucci, P., et al. (2006). Visible and near ultraviolet photocurrent generation in carbon nanotubes. In Surface Science (pp.2810-2813). AMSTERDAM : ELSEVIER SCIENCE BV [10.1016/j.susc.2006.12.046].
De Crescenzi, M; Tombolini, F; Scarselli, Ma; Gobbo, S; Speiser, E; Castrucci, P; Diociaiuti, M; Casciardi, S; Gatto, E; Venanzi, M
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/37454
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