Web Release Date: November 13,
Fluorescence Efficiency of Individual Carbon Nanotubes
and
Chemistry Department, University of Rochester, Rochester, New York 14627, School of Applied Engineering Physics, Cornell University, Ithaca, New York 14853, and DuPont Central Research and Development, Experimental Station, Wilmington, Delaware 19880
Received August 12, 2007
Revised October 8, 2007
Abstract:
The luminescence efficiency of individual single-walled carbon nanotubes was determined by comparing the fluorescence from individual nanotubes to single CdTe/ZnS quantum dots with a well-defined fluorescence quantum yield (QY). The single carbon nanotube QY was determined to be 3 ± 1%, nearly 100 times greater than values previously reported for ensembles. The intrinsic nanotube QY is potentially much higher than previously believed and appears lower in ensembles due to defective nanotubes and residual bundles.
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