• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Heat and Mass Transfer >Differential laser flash Raman spectroscopy method for non-contact characterization of thermal transport properties of individual nanowires
【24h】

Differential laser flash Raman spectroscopy method for non-contact characterization of thermal transport properties of individual nanowires

机译：差分激光闪光拉曼光谱法非接触表征单个纳米线的热传递性质

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Thermal transport properties of nanowires are fundamental parameters for the thermal design of nanodevices, but their accurate determination is very challenging. Here, we present a reliable non-contact method for characterizing individual nanowires based on the analytical solutions of transient and steady-state thermal transport model. The thermal diffusivity can be extracted by comparing the temperature increases induced by continuous laser and square-pulse laser heating without knowing the laser absorption coefficient. Our method has been verified by comparing the measured thermal diffusivity of an individual 10.0 mu m diameter platinum wire with standard values. Then we applied this strategy to the characterization of an individual silicon nanowire (SiNW). Results show that SiNW's thermal diffusivity decreases from 6.3 x 10(-5)m(2)/s to 2.6 x 10(-5) m(2)/s when the temperature increases from 270 K to 485 K, which is lower than that of the corresponding pure bulk silicon value, indicating the surface and impurity scattering reduces the mean free path of the heat carriers. (C) 2019 Elsevier Ltd. All rights reserved.
机译：纳米线的热传递特性是纳米器件热设计的基本参数，但其准确确定非常具有挑战性。在这里，我们基于瞬态和稳态热传输模型的解析解，提出了一种可靠的非接触方法来表征单个纳米线。可以在不知道激光吸收系数的情况下，通过比较连续激光和方脉冲激光加热引起的温度升高来提取热扩散率。我们的方法通过将一根直径为10.0微米的铂丝的测得的热扩散率与标准值进行比较而得到验证。然后，我们将此策略应用于单个硅纳米线（SiNW）的表征。结果表明，当温度从270 K增加到485 K时，SiNW的热扩散率从6.3 x 10（-5）m（2）/ s降低到2.6 x 10（-5）m（2）/ s，低于相应的纯体硅值的变化，表明表面和杂质的散射降低了热载体的平均自由程。 （C）2019 Elsevier Ltd.保留所有权利。

著录项

  • 来源
  • 作者

    Liu Jinhui; Liu Hao; Hu Yudong; Zhang Xing;

  • 作者单位

    Nanjing Univ Sci & Technol, Sch Energy & Power Engn, MIIT Key Lab Thermal Control Elect Equipment, Nanjing 210094, Jiangsu, Peoples R China;

    Nanjing Univ Sci & Technol, Sch Energy & Power Engn, MIIT Key Lab Thermal Control Elect Equipment, Nanjing 210094, Jiangsu, Peoples R China;

    Tsinghua Univ, Dept Engn Mech, Minist Educ, Key Lab Thermal Sci & Power Engn, Beijing 100084, Peoples R China;

    Tsinghua Univ, Dept Engn Mech, Minist Educ, Key Lab Thermal Sci & Power Engn, Beijing 100084, Peoples R China;

  • 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

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号