Francesco Mastrocinque, George Bullard, James A Alatis, Joseph A Albro, Animesh Nayak, Nicholas X Williams, Amar Kumbhar, Hope Meikle, Zachary X W Widel, Yusong Bai, Alexis K Harvey, Joanna M Atkin, David H Waldeck, Aaron D Franklin, Michael J Therien
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...
March 19, 2024: Proceedings of the National Academy of Sciences of the United States of America