1 research outputs found
Determining the Chiral Index of Semiconducting Carbon Nanotubes Using Photoconductivity Resonances
We
utilize photoconductivity spectroscopy to identify the unique
chiral structure of individual carbon nanotubes (CNTs). Peaks in photoconductivity
are measured throughout the visible and near-IR wavelength ranges.
Photoconductivity peaks associated with individual CNTs are referenced
against existing Rayleigh scattering measurements to uniquely identify
chiral indices. We find close agreement between our assigned exciton
resonances and the previously published exciton resonances. The typical
net energy mismatch is ≤20 meV. By enabling chiral identification
of CNTs after the completion of device fabrication, the technique
offers a facile method for investigating relationships between CNT
structure and electronic/optoelectronic properties