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Band Gap Fluorescence from Individual Single-Walled Carbon Nanotubes

by O'Connell, Michael J. , Hauge, Robert H. , Huffman, Chad B. , Bachilo, Sergei M. , Moore, Valerie C. , Smalley, Richard E. , Boul, Peter J. , Noon, William H. , Ma, Jianpeng , Kittrell, Carter , Haroz, Erik H. , Rialon, Kristy L. , Strano, Michael S. , Weisman, R. Bruce

in Absorption spectra / Algorithms / Carbon / Carbon allotropes / Carbon nanotubes / Centrifugation / Chemical suspensions / Condensed matter: electronic structure, electrical, magnetic, and optical properties / Emission spectra / Exact sciences and technology / Fluorescence / Fullerenes / Micelles / Nanotechnology / Nanotubes / Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation / Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures / Physics / Scientific Concepts / Suspension / Water / Wavelengths

2002

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Band Gap Fluorescence from Individual Single-Walled Carbon Nanotubes

2002

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2002

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Journal Article

Band Gap Fluorescence from Individual Single-Walled Carbon Nanotubes

O'Connell, Michael J.,

Hauge, Robert H.,

Huffman, Chad B.,

Bachilo, Sergei M.,

Moore, Valerie C.,

Smalley, Richard E.,

Boul, Peter J.,

Noon, William H.,

Ma, Jianpeng,

Kittrell, Carter,

Haroz, Erik H.,

Rialon, Kristy L.,

Strano, Michael S.,

Weisman, R. Bruce

2002

Overview

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.

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Publisher

American Association for the Advancement of Science,The American Association for the Advancement of Science

Subject

/ Carbon

/ Chemical suspensions