Abstract
The electronic properties of single walled carbon nanotubes (SWNTs) can change with a slight deformation, such as the one caused by the pressure of one SWNT crossing over the other in an “” shape. The effect, however, is extremely localized. We present a tip-enhanced Raman investigation of the extremely localized semiconductor-to-metal transition of SWNTs in such a situation, where we can see how the Fano interaction, which is a Raman signature of metallic behavior, grows towards the junction and is localized within a few nanometers of its vicinity. After exploring the deconvoluted components of the -band Raman mode, we were able to reveal the change in electronic properties of a SWNT at extremely high spatial resolution along its length.
- Received 25 April 2013
DOI:https://doi.org/10.1103/PhysRevLett.111.216101
© 2013 American Physical Society