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首页> 外文期刊>Nanotechnology >The role of electrical and thermal contact resistance for Joule breakdown of single-wall carbon nanotubes
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The role of electrical and thermal contact resistance for Joule breakdown of single-wall carbon nanotubes

机译：电气和热接触电阻对单壁碳纳米管焦耳击穿的作用

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Several data sets for the electrical breakdown in air of single-wall carbon nanotubes (SWNTs) on insulating substrates are collected and analyzed. A universal scaling of the Joule breakdown power with nanotube length is found, which appears to be independent of the substrate thermal properties of their thickness. This suggests that the thermal resistances at SWNT-insulator and at SWNT-electrode interfaces govern heat sinking from the nanotube. Analytical models for the breakdown power scaling are presented, providing an intuitive, physical understanding of the breakdown process. The electrical and thermal resistances at the electrode contacts limit the breakdown behavior for sub-micron SWNTs+ADs- the breakdown power scales linearly with length for tubes that are microns long, and a minimum breakdown power (similar to 0.05 mW) is observed for the intermediate (similar to 0.5 mu m) length range.
机译：收集并分析了绝缘基板上单壁碳纳米管（SWNT）在空气中的电击穿的几个数据集。发现焦耳击穿能力随纳米管长度的普遍缩放，这似乎与它们厚度的基板热性能无关。这表明SWNT绝缘体和SWNT电极界面处的热阻控制着从纳米管散热。提出了用于击穿功率缩放的分析模型，从而提供了对击穿过程的直观，物理理解。电极触点处的电阻和热阻限制了亚微米SWNTs + ADs的击穿行为-击穿功率随长度的变化呈线性关系，而长度为微米的管，则观察到最小击穿功率（约0.05 mW）。中等长度（约0.5微米）。

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