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