Experimental study of thermal rectification in suspended monolayer graphene

Haidong Wang, Shiqian Hu, Koji Takahashi, Xing Zhang (), Hiroshi Takamatsu () and Jie Chen ()
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Haidong Wang: Kyushu University
Shiqian Hu: Center for Phononics and Thermal Energy Science, School of Physics Science and Engineering, and Institute for Advanced Study, Tongji University
Koji Takahashi: Kyushu University
Xing Zhang: International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University
Hiroshi Takamatsu: Kyushu University
Jie Chen: Center for Phononics and Thermal Energy Science, School of Physics Science and Engineering, and Institute for Advanced Study, Tongji University

Nature Communications, 2017, vol. 8, issue 1, 1-8

Abstract: Abstract 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.

Date: 2017
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DOI: 10.1038/ncomms15843

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