Anomalous heat conduction in a carbon nanowire: Molecular dynamics calculations

TL;DR

This study uses molecular dynamics to investigate heat conduction in a carbon nanowire within a nanotube, revealing high thermal conductivity that increases with chain length, indicating anomalous heat transfer behavior.

Contribution

First molecular dynamics analysis of heat conduction in a carbon nanowire inside a nanotube, showing divergence of thermal conductivity with length.

Findings

Thermal conductivity is very high at room temperature.

Conductivity diverges logarithmically with chain length.

Heat conduction exhibits anomalous behavior.

Abstract

Heat conduction of a real quasi-one dimensional material, the finite length carbon nanowire (CNW), inserted into the single-walled carbon nanotube (SWNT) has been studied by the molecular dynamical (MD) method, in which both of the longitudinal as well as transverse motions of the chain atoms in the SWNT have been permitted. It is found that the thermal conductivity $\kappa $ of the carbon nanowire is very high at room temperature, and diverges more likely with the chain length logarithmically.