Resonance Raman signature of intertube excitons in compositionally-defined carbon nanotube bundles.

ABSTRACT: Electronic interactions in low-dimensional nanomaterial heterostructures can lead to novel optical responses arising from exciton delocalization over the constituent materials. Similar phenomena have been suggested to arise between closely interacting semiconducting carbon nanotubes of identical structure. Such behavior in carbon nanotubes has potential to generate new exciton physics, impact exciton transport mechanisms in nanotube networks, and place nanotubes as one-dimensional models for such behaviors in systems of higher dimensionality. Here we use resonance Raman spectroscopy to probe intertube interactions in (6,5) chirality-enriched bundles. Raman excitation profiles for the radial breathing mode and G-mode display a previously unobserved sharp resonance feature. We show the featu

SUBMITTER: Simpson JR 

PROVIDER: S-EPMC5809379 | biostudies-literature | 2018 Feb

REPOSITORIES: biostudies-literature