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.[Figure not available: see fulltext.]
Bibliographical noteFunding Information:
Dr. Haiqing Zhou and Dr. Jixin Zhu contributed equally to this work. This project was supported by the Singapore National Research Foundation under NRF RF Award No. NRF-RF2010-07, the AFOSR MURI (FA9550-12-1-0035), Air Force Office of Scientific Research (FA9550-09-1-0581), U.S. Army Research Office MURI grant W911NF-11-1-0362 and the U.S. Office of Naval Research MURI grant N000014-09- 1-1066.
© 2014, Tsinghua University Press and Springer-Verlag Berlin Heidelberg.
- Raman spectroscopy
- hexagonal boron nitride (h-BN)
- thermal conductivity
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Materials Science(all)
- Condensed Matter Physics
- Electrical and Electronic Engineering