Effect of substrate on thermal conductivity of single-walled carbon nanotubes

We analyze numerically the thermal conductivity of single-walled carbon nanotubes placed on a. at rigid substrate. We demonstrate that the character of thermal conductivity depends crucially on the interaction between the nanotube and the substrate. In particular, we reveal that unlike the well-established anomalous thermal conductivity of isolated carbon nanotubes, the nanotube placed on a substrate demonstrates normal thermal conductivity due to the appearance of a narrow gap in the frequency spectrum of acoustic phonons. Copyright (c) EPLA, 2009