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Tunable thermal transport and thermal rectification in strained graphene nanoribbons

机译:应变石墨烯纳米带中的可调热传输和热精馏

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摘要

Using molecular dynamics (MD) simulations, we study thermal transport in graphene nanoribbons (GNR) subjected to uniform uniaxial and nonuniform strain fields. We predict significant thermal rectification (over 70%) in a rectangular armchair GNR by applying a transverse force asymmetrically. The heat flux is larger from the less stressed region to the more stressed region. Furthermore, we develop a theoretical framework based on the nonequilibrium thermodynamics to discuss when thermal rectification under a stress gradient can occur. We conclude with a discussion of details relevant to experiment.
机译:使用分子动力学(MD)模拟,我们研究了石墨烯纳米带(GNR)中受均匀单轴和不均匀应变场影响的热传输。我们预测通过不对称地施加横向力,矩形扶手椅GNR中将发生明显的热整流(超过70%)。从应力较小的区域到应力较大的区域的热通量更大。此外,我们建立了基于非平衡热力学的理论框架,以讨论何时可以在应力梯度下进行热整流。最后,我们讨论了与实验有关的细节。

著录项

  • 来源
    《Physical review》 |2012年第24期|p.245417.1-245417.5|共5页
  • 作者单位

    Homer L. Dodge Department of Physics and Astronomy, Center for Semiconductor Physics in Nanostructures, The University of Oklahoma, Norman, Oklahoma 73069, USA;

    Homer L. Dodge Department of Physics and Astronomy, Center for Semiconductor Physics in Nanostructures, The University of Oklahoma, Norman, Oklahoma 73069, USA;

    Birk Nanotechnology Center and School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, USA;

    Birk Nanotechnology Center and School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, USA,Birk Nanotechnology Center and Department of Physics, Purdue University, West Lafayette, Indiana 47907, USA;

    Birk Nanotechnology Center and School of Mechanical Engineering, Purdue University, West Lafayette, Indiana 47907, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    heat conduction; heat flow in multiphase systems;

    机译:导热多相系统中的热流;

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