Length characterization of DMA-wrapped carbon nanotubes using Raman spectroscopy

S. G. Chou, H. Son, J. Kong, A. Jorio, R. Saito, M. Zheng, G. Dresselhaus, M. S. Dresselhaus

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42 Citations (Scopus)


A systematic resonance Raman study has been carried out on DNA-wrapped single walled carbon nanotubes (SWCNTs) of three different average lengths 〈Ltube〉 using seven different values of laser excitation energy Elaser. The dependence of the intensity ratio of the D-band and G-band Raman features (ID/IG) on 〈L tube〉 indicates that nanotube length can be used as an important structural parameter for Raman characterization. By systematically varying Elaser, the ratio ID/IG is found to be much stronger for metallic than for semiconducting SWCNTs but appears to have the same functional dependence on Elaser and 〈Ltube〉 or crystallite size as does nanographite.

Original languageEnglish
Article number131109
JournalApplied Physics Letters
Issue number13
Publication statusPublished - 2007

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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