Band Gap Fluorescence from Individual Single-Walled Carbon Nanotubes

DOI Web Site 238 Citations
  • Michael J. O'Connell
    Department of Chemistry, Rice Quantum Institute, and Center for Nanoscale Science and Technology,
  • Sergei M. Bachilo
    Department of Chemistry, Rice Quantum Institute, and Center for Nanoscale Science and Technology,
  • Chad B. Huffman
    Department of Chemistry, Rice Quantum Institute, and Center for Nanoscale Science and Technology,
  • Valerie C. Moore
    Department of Chemistry, Rice Quantum Institute, and Center for Nanoscale Science and Technology,
  • Michael S. Strano
    Department of Chemistry, Rice Quantum Institute, and Center for Nanoscale Science and Technology,
  • Erik H. Haroz
    Department of Physics,
  • Kristy L. Rialon
    Department of Chemistry, Rice Quantum Institute, and Center for Nanoscale Science and Technology,
  • Peter J. Boul
    Department of Chemistry, Rice Quantum Institute, and Center for Nanoscale Science and Technology,
  • William H. Noon
    Department of Bioengineering, Rice University, 6100 Main Street, Houston, TX 77005, USA.
  • Carter Kittrell
    Department of Chemistry, Rice Quantum Institute, and Center for Nanoscale Science and Technology,
  • Jianpeng Ma
    Department of Bioengineering, Rice University, 6100 Main Street, Houston, TX 77005, USA.
  • Robert H. Hauge
    Department of Chemistry, Rice Quantum Institute, and Center for Nanoscale Science and Technology,
  • R. Bruce Weisman
    Department of Chemistry, Rice Quantum Institute, and Center for Nanoscale Science and Technology,
  • Richard E. Smalley
    Department of Chemistry, Rice Quantum Institute, and Center for Nanoscale Science and Technology,

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Description

<jats:p>Fluorescence has been observed directly across the band gap of semiconducting carbon nanotubes. We obtained individual nanotubes, each encased in a cylindrical micelle, by ultrasonically agitating an aqueous dispersion of raw single-walled carbon nanotubes in sodium dodecyl sulfate and then centrifuging to remove tube bundles, ropes, and residual catalyst. Aggregation of nanotubes into bundles otherwise quenches the fluorescence through interactions with metallic tubes and substantially broadens the absorption spectra. At pH less than 5, the absorption and emission spectra of individual nanotubes show evidence of band gap–selective protonation of the side walls of the tube. This protonation is readily reversed by treatment with base or ultraviolet light.</jats:p>

Journal

  • Science

    Science 297 (5581), 593-596, 2002-07-26

    American Association for the Advancement of Science (AAAS)

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