Nanometer-level temperature mapping of Joule-heated carbon nanotubes by plasmon spectroscopy
Nanometer-level temperature mapping of Joule-heated carbon nanotubes by plasmon spectroscopy
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DOI：
10.1016/j.carbon.2022.10.006
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发表时间：
2022-10
期刊：
影响因子：
10.9
通讯作者：
O. Cretu;Daiming Tang;D. Lu;B. Da;Y. Nemoto;N. Kawamoto;M. Mitome;Zejun Ding;Koji Kimoto
中科院分区：
文献类型：
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作者：
O. Cretu;Daiming Tang;D. Lu;B. Da;Y. Nemoto;N. Kawamoto;M. Mitome;Zejun Ding;Koji Kimoto
我们映射悬浮碳纳米管的温度分布下降到5纳米的水平内的透射电子显微镜，通过使用电子能量损失等离子体光谱。通过使用偏置保持器单独接触纳米管，原位焦耳加热纳米管。纳米管可以承受超过5 × 107 A/cm 2的电流密度和超过2000 K的温度而不断裂。由于相对较大的电阻和较小的导热面积，温度在纳米探针接触周围达到其最大值。由于石墨晶格的优异的面内导热率（高达2800 W/m/K），温度沿CNT的整个长度保持高沿着。这些结果验证了这些结构的预期鲁棒性，并确认它们作为在极高电流密度和温度下的互连应用的理想候选者。
We map the temperature distribution of suspended carbon nanotubes down to the 5-nm level inside a transmission electron microscope, by using electron energy-loss plasmon spectroscopy. The nanotubes are Joule heated in-situ, by individually contacting them using a biasing holder. The nanotubes can withstand current densities of over 5 × 107A/cm2and temperatures of over 2000 K without breaking. The temperature reaches its maximum around the nanoprobe contact, due to the comparatively large electrical resistance and small thermally-conductive area. The temperature remains high along the entire length of the CNTs, due to the excellent in-plane thermal conductivity (up to 2800 W/m/K) of the graphitic lattice. These results verify the expected robustness of these structures and confirm them as ideal candidates for applications as interconnects under extremely high current densities and temperatures.