Journal
JOURNAL OF APPLIED PHYSICS
Volume 105, Issue 8, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3088924
Keywords
carbon nanotubes; chirality; Green's function methods; phonons; thermal conductivity
Categories
Ask authors/readers for more resources
Using atomistic Green's function calculations, we find that the phonon thermal conductivity of pellets composed of similar to mu m long carbon nanotubes has an upper bound of a few W/m K. This is in striking contrast with the extremely high thermal conductivity of individual nanotubes (similar to 3000 W/m K). We show that, at room temperature, this upper bound does not depend on the nanotube diameter. Conversely, for low temperatures, an inverse proportionality with nanotube diameter is predicted. We present concrete results as a function of nanotube length and chirality, pellet density, and temperature. These results imply that carbon nanotube pellets belong to the category of thermal insulators, contrasting with the good conducting properties of parallel nanotube arrays, or individual nanotubes.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available