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Thermal transport in hexagonal boron nitride nanoribbons
Tao Ouyang1, Yuanping Chen, Yuee Xie
1Laboratory for Quantum Engineering and Micro-Nano Energy Technology and Institute of Physics, Xiangtan University, Xiangtan 411105, Hunan, People's Republic of China.
Hexagonal boron nitride nanoribbons (BNNRs) exhibit excellent thermal transport properties, comparable to or exceeding graphene nanoribbons (GNRs) below room temperature. Their anisotropic nature and T(1.5) dependence are key to their thermal performance.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Hexagonal boron nitride nanoribbons (BNNRs) are 2D materials with unique electronic and mechanical properties.
- Understanding their thermal transport is crucial for designing advanced thermal management devices.
Purpose of the Study:
- To investigate the thermal transport properties of hexagonal boron nitride nanoribbons (BNNRs).
- To compare the thermal conductance of BNNRs with graphene nanoribbons (GNRs).
- To explore the anisotropy of thermal transport in BNNRs.
Main Methods:
- Phonon spectrum calculations.
- Thermal conductance calculations.
- Analysis of temperature dependence and edge effects.
Main Results:
- BNNRs demonstrate excellent thermal transport properties.
- BNNR thermal conductance is comparable to or surpasses GNRs below room temperature.
- A fitting formula highlights the T(1.5) dependence of thermal transport.
- Significant anisotropic thermal transport observed, with zigzag-edged BNNRs showing ~20% higher thermal conductivity than armchair-edged BNNRs at room temperature.
Conclusions:
- BNNRs possess superior thermal transport capabilities.
- The findings suggest potential applications for BNNRs in advanced thermal devices.
- Anisotropic thermal transport in BNNRs offers opportunities for directional heat management.
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