Experimental study of thermal rectification in suspended monolayer graphene.
Experimental study of thermal rectification in suspended monolayer graphene.
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悬浮单层石墨烯热整流实验研究
DOI：
10.1038/ncomms15843
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发表时间：
2017-06-13
影响因子：
16.6
通讯作者：
Chen J
中科院分区：
文献类型：
--
作者：
Wang H;Hu S;Takahashi K;Zhang X;Takamatsu H;Chen J
热整流是主动热流控制的基本现象。在非对称纳米结构中，如纳米线和薄膜中，预计会存在显著的热整流。许多分子动力学模拟表明，石墨烯作为单原子厚的薄膜，其热整流的实现备受关注。在这里，我们通过实验证明了各种不对称单层石墨烯纳米结构中的热整流。在单侧具有纳米孔的缺陷工程单层石墨烯中实现了26%的大热整流系数。在原始单层石墨烯中，可以实现10%的热整流系数，其中纳米颗粒沉积在一侧或具有锥形宽度。结果表明，单层石墨烯在设计高性能热流控制和能量收集的热整流器方面具有很大的潜力。
Thermal rectification is a fundamental phenomenon for active heat flow control. Significant thermal rectification is expected to exist in the asymmetric nanostructures, such as nanowires and thin films. As a one-atom-thick membrane, graphene has attracted much attention for realizing thermal rectification as shown by many molecular dynamics simulations. Here, we experimentally demonstrate thermal rectification in various asymmetric monolayer graphene nanostructures. A large thermal rectification factor of 26% is achieved in a defect-engineered monolayer graphene with nanopores on one side. A thermal rectification factor of 10% is achieved in a pristine monolayer graphene with nanoparticles deposited on one side or with a tapered width. The results indicate that the monolayer graphene has great potential to be used for designing high-performance thermal rectifiers for heat flow control and energy harvesting.