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Thermal Conductivity Measurement of Graphene Exfoliated on Silicon Dioxide

机译:二氧化硅剥落石墨烯的导热系数测量

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摘要

We have developed a nanofabricated resistance thermometer device to measure the thermal conductivity of graphene monolayers exfoliated onto silicon dioxide. The measurement results show that the thermal conductivity of the supported graphene is approximately 600 W/m K at room temperature. While this value is lower than the reported basal plane values for graphite and suspended graphene because of phonon leakage across the graphene-support interface, it is still considerably higher than the values for common thin film electronic materials. Here, we present a detailed discussion of the design and fabrication of the measurement device. Analytical and numerical heat transfer solutions are developed to evaluate the accuracy and uncertainty of this method for thermal conductivity measurement of high-thermal conductivity ultrathin films.
机译:我们开发了一种纳米制造的电阻温度计设备,用于测量剥离到二氧化硅上的石墨烯单层的热导率。测量结果表明,在室温下,负载的石墨烯的热导率约为600 W / mK。尽管由于声子跨过石墨烯-载体界面的泄漏,该值低于所报告的石墨和悬浮石墨烯的基面值,但它仍大大高于普通薄膜电子材料的值。在此,我们对测量设备的设计和制造进行了详细的讨论。开发了分析和数值传热解决方案,以评估该方法用于高导热率超薄膜热导率测量的准确性和不确定性。

著录项

  • 来源
    《Journal of Heat Transfer》 |2011年第2期|p.022403.1-022403.7|共7页
  • 作者单位

    Department of Mechanical Engineering,University of Texas at Austin,Austin, TX 78712;

    Department of Mechanical Engineering,University of Texas at Austin,Austin, TX 78712;

    Department of Mechanical Engineering,University of Texas at Austin,Austin, TX 78712;

    Department of Physics, University of Texas at Austin, Austin, TX 78712;

    Department of Physics, University of Texas at Austin, Austin, TX 78712;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    thermal conductivity; supported graphene; phonon transport; measurement;

    机译:导热系数;负载石墨烯声子运输测量;

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