Abstract
The encapsulation of viologen derivatives into metallic single-walled carbon nanotubes (SWNTs) results in the opening of a band gap, making the SWNTs semiconducting.
Raman spectroscopy, thermogravimetric analysis, and aberration-corrected high-resolution transmission electron microscopy confirm the encapsulation process.
Through the fabrication of field-effect transistor devices, the change of the electronic structure of the tubes from metallic to semiconductingupon the encapsulation is confirmed.
The opening of a gap in the band structure of the tubes was not detected in supramolecular controls.