Optical characterization of DNA-wrapped carbon nanotube hybrids

S. G. Chou*, H. B. Ribeiro, E. B. Barros, A. P. Santos, D. Nezich, Ge G. Samsonidze, C. Fantini, M. A. Pimenta, A. Jorio, F. Plentz Filho, M. S. Dresselhaus, G. Dresselhaus, R. Saito, M. Zheng, G. B. Onoa, E. D. Semke, A. K. Swan, M. S. Ünlü, B. B. Goldberg

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

127 Scopus citations

Abstract

Optical characterization of DNA-wrapped CoMoCAT carbon nanotube hybrids (DNA-CNT) and semiconductor-enriched DNA-CNT was carried out using resonant Raman spectroscopy (RRS) and photoluminescence (PL) experiments. The values of radial breathing modes frequency ωRBM were found to be relatively insensitive to the type of wrapping agents surrounding the nanotube. The values of ωRBM and the first and second resonant interband transitions, E11 and E22, for a particular (n, m) tube for all sample types in RRS and PL measurements are found to correspond to the values obtained for SDS-dispersed nanotubes measured with PL, but with a shift in Eii ranging from 10 to 80 meV. The DNA-wrapping has shown not only to provide good isolation to the individual nanotube in a bundle, but the DNA wrapping mechanism for the CoMoCAT sample has also been shown to be diameter selective.

Original languageEnglish (US)
Pages (from-to)296-301
Number of pages6
JournalChemical Physics Letters
Volume397
Issue number4-6
DOIs
StatePublished - Oct 21 2004

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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