Complex optical study of carbon nanotubes with a narrow diameter distribution

A. V. Belkin*, E.A. Obraztsova, Pavel V. Fedotov, M. He, E. I. Kauppinen, Elena D. Obraztsova

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

Abstract

This work is dedicated to the complex optical diagnostics of carbon nanotube samples with a narrow diameter distribution. Nanotubes were synthesized with a modified CVD growth technique, which provides the samples of single-wall carbon nanotubes with only few close diameters. We have used three optical methods (UV-vis-NIR optical absorption spectroscopy, Raman spectroscopy and photoluminescence) to make the overall characterization of the samples. A new technique has been proposed providing the measurement of electronic parameters of the nanotubes with the resonant Raman scattering only. Under the different excitation energies the different bands in the Raman spectra (breathing modes, one- or two-phonon scattering) could dominate due to "outcoming" resonances occurring in case of an exact coincidence of the scattered photon energy with the electronic transition. The estimation of electronic transition values was based on the difference of the incoming light energy and the energy of vibration dominating in spectrum under this excitation. The Raman estimations have been confirmed by direct data of UV-vis-NIR optical absorption and photoluminescence spectroscopy.

Original languageEnglish
Pages (from-to)95-99
Number of pages5
JournalJournal of Nanoelectronics and Optoelectronics
Volume8
Issue number1
DOIs
Publication statusPublished - Jan 2013
MoE publication typeA1 Journal article-refereed

Keywords

  • Carbon Nanotubes
  • Electronic Transition
  • Narrow Diameter Distribution
  • Spectroscopy

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