Exciton resonances quench the photoluminescence of zigzag carbon nanotubes
Preprint
- 23 April 2005
Abstract
We show that the photoluminescence intensity of single-walled carbon nanotubes is much stronger in tubes with large chiral angles - armchair tubes - because exciton resonances make the luminescence of zigzag tubes intrinsically weak. This exciton-exciton resonance depends on the electronic structure of the tubes and is found more often in nanotubes of the +1 family. Armchair tubes do not necessarily grow preferentially with present growth techniques; they just have stronger luminescence. Our analysis allows to normalize photoluminescence intensities and find the abundance of nanotube chiralities in macroscopic samples.Keywords
All Related Versions
- Version 1, 2005-04-23, ArXiv
- Published version: Physical Review Letters, 95 (7), 077402.
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