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Journal of Nanomaterials
Volume 2010, Article ID 537657, 5 pages
Research Article

Isotope Effect on the Thermal Conductivity of Graphene

1Department of Physics, University of Texas at Dallas, Richardson, TX 75080, USA
2Departamento de Física, Instituto de Ciências Exatas (ICEx), Universidade Federal Fluminense, 27213-350, Volta Redonda, RJ, Brazil
3Department of Chemistry, University of North Texas, Denton, TX 76203, USA
4Department of Materials Science and Engineering, University of Texas at Dallas, Richardson, TX 75080, USA

Received 1 June 2010; Accepted 7 July 2010

Academic Editor: Rakesh Joshi

Copyright © 2010 Hengji Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The thermal conductivity (TC) of isolated graphene with different concentrations of isotope (C13) is studied with equilibrium molecular dynamics method at 300 K. In the limit of pure C12 or C13 graphene, TC of graphene in zigzag and armchair directions are ~630 W/mK and ~1000W/mK, respectively. We find that the TC of graphene can be maximally reduced by ~80%, in both armchair and zigzag directions, when a random distribution of C12 and C13 is assumed at different doping concentrations. Therefore, our simulation results suggest an effective way to tune the TC of graphene without changing its atomic and electronic structure, thus yielding a promising application for nanoelectronics and thermoelectricity of graphene-based nano device.