High thermal conductivity of suspended few-layer hexagonal boron nitride sheets
two-dimensional, hexagonal boron nitride (h-BN), thermal conductivity, Raman spectroscopy
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.
Tsinghua University Press
Haiqing Zhou,Jixin Zhu,Zheng Liu,Zheng Yan,Xiujun Fan,Jian Lin,Gunuk Wang,Qingyu Yan,Ting Yu,Pulickel M. Ajayan,James M. Tour, High thermal conductivity of suspended few-layer hexagonal boron nitride sheets. NanoRes.2014, 7(8): 1232–1240