High thermal conductivity of suspended few-layer hexagonal boron nitride sheets


The thermal conduction of suspended few-layer hexagonal boron nitride (h-BN) sheets was experimentally investigated using a noncontact micro-Raman spectroscopy method. The first-order temperature coefficients for monolayer (1L), bilayer (2L) and nine-layer (9L) h-BN sheets were measured to be −(3.41 ± 0.12) × 10−2, −(3.15 ± 0.14) × 10−2 and −(3.78 ± 0.16) × 10−2 cm−1·K−1, respectively. The room-temperature thermal conductivity of few-layer h-BN sheets was found to be in the range from 227 to 280 W·m−1·K−1, which is comparable to that of bulk h-BN, indicating their potential use as important components to solve heat dissipation problems in thermal management configurations.

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Correspondence to Qingyu Yan or Ting Yu or Pulickel M. Ajayan or James M. Tour.

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Zhou, H., Zhu, J., Liu, Z. et al. High thermal conductivity of suspended few-layer hexagonal boron nitride sheets. Nano Res. 7, 1232–1240 (2014). https://doi.org/10.1007/s12274-014-0486-z

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  • two-dimensional
  • hexagonal boron nitride (h-BN)
  • thermal conductivity
  • Raman spectroscopy