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

• Main Authors: Zhou, Haiqing, Zhu, Jixin, Liu, Zheng, Yan, Zheng, Fan, Xiujun, Lin, Jian, Wang, Gunuk, Yan, Qingyu, Yu, Ting, Ajayan, Pulickel M., Tour, James M.
• Other Authors: School of Materials Science & Engineering
• Format: Article
• Language: English
• Published: 2014
• Subjects: DRNTU::Science::Physics::Atomic physics::Solid state physics; DRNTU::Engineering::Materials::Energy materials
• Online Access: https://hdl.handle.net/10356/103152; http://hdl.handle.net/10220/24431
• Institution: Nanyang Technological University

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.