Regularity in the intratube interaction in double-wall carbon nanotubes

TL;DR

This study uses high pressure Raman spectroscopy to reveal regular patterns in the intratube interactions of double-wall carbon nanotubes, showing how these interactions influence their electronic properties.

Contribution

It uncovers a regularity in the strength of intratube interactions linked to tube size and spacing, highlighting their role in DWCNT dynamics.

Findings

Regularity in intratube interaction strength observed

Pressure induces red shift in inner tube band gaps

Interaction between shells influences DWCNT interior dynamics

Abstract

High pressure Raman experiments were performed on bundled double wall carbon nanotubes (DWCNTs). We observe peculiar regularity in the strength of the inner-outer tube (intratube) interaction, which is attributed to the interplay between the tube size and the intratube spacing. Moreover, a pressure-induced red shift of the band gap energies of the probed inner tubes is deduced from the Raman spectra. These experimental findings reveal that the interaction between primary and secondary shells, although generally assumed to be weak, determines the dynamics in the interior of the DWCNTs.