| RESEARCH |
Fluorescence of lone nanotubes Until now, to study the optical properties of single-walled carbon nanotubes (SWNTs), researchers have had to use ensembles of the molecules. However, a team of researchers from the Institute of Optics and the chemistry department at the University of Rochester has found that unavoidable inhomogeneities in these ensembles may lead scientists to miss important nanotube characteristics. In the first report of fluorescence from individual carbon nanotubes [Science, 301, 1354 (2003)], the team, led by professors Todd D. Krauss and Lukas Novotny, found that nanotubes with identical structures emit with different frequencies, line widths, and intensities--probably due to defects or the local environment. Also, the researchers unexpectedly found that, unlike most other molecules, SWNT fluorescence does not fluctuate. Krauss says these results could lead to future applications in nanophotonics |
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