Band gap opening of metallic single-walled carbon nanotubes via noncovalent symmetry breaking.

ABSTRACT: Covalent bonding interactions determine the energy-momentum (E-k) dispersion (band structure) of solid-state materials. Here, we show that noncovalent interactions can modulate the E-k dispersion near the Fermi level of a low-dimensional nanoscale conductor. We demonstrate that low energy band gaps may be opened in metallic carbon nanotubes through polymer wrapping of the nanotube surface at fixed helical periodicity. Electronic spectral, chiro-optic, potentiometric, electronic device, and work function data corroborate that the magnitude of band gap opening depends on the nature of the polymer electronic structure. Polymer dewrapping reverses the conducting-to-semiconducting phase transition, restoring the native metallic carbon nanotube electronic structure. T

SUBMITTER: Mastrocinque F 

PROVIDER: S-EPMC10962935 | biostudies-literature | 2024 Mar

REPOSITORIES: biostudies-literature