Thermal conductivity of B-C-N and BN nanotubes

ORAL

Abstract

We have measured the temperature-dependent thermal conductivity \textit{$\kappa $(T)} of boron-carbon-nitride (B-C-N) and boron nitride (BN) nanotube mats between room temperature and 20K. For both materials, \textit{$\kappa $(T)} increases with increasing temperature, with no sign of saturation. We employ a new analysis method to estimate the intrinsic \textit{$\kappa $(T)} of BN nanotubes converted from B-C-N nanotubes, and find that at room temperature \textit{$\kappa $(T)} of a multi-walled BN nanotube is comparable to that of a multi-walled carbon nanotube. At low temperature, the functional form of \textit{$\kappa $(T)} reflects dimensional confinement.

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Authors

  • Chih-Wei Chang

  • Wei-Qiang Han

  • Alex Zettl

    University of California, Berkeley, Department of Physics, Department of Materials Science and Engineering, UC Berkeley; Materials Sciences Division, LBNL; Berkeley, CA 94720, Physics department, University of California at Berkeley, Department of Physics, UC Berkeley, and Materials Sciences Division, LBNL, Berkeley, California 94720, Physics Department, University of California at Berkeley, and Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley CA 94720, University of California-Berkeley, MSD, LBNL, Berkeley, Caifornia 94720 and Dept. of Physics, UC Berkeley, California, 94720, MSD,LBNL, Berkeley, Caifornia 94720 and Dept. of Physics, UC Berkeley, California, 94720