Characterization of thermal transport in multiwalled carbon nanotube using FIB irradiation

Koji Takahashi, H. Hayashi
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引用次数: 1

Abstract

Thermal conductance of an individual multiwalled carbon nanotube was measured as a function of its length. Focused ion beam was used to shorten a 4.8 micrometer-long nanotube to 2.4, 1.2, 0.6, and 0.3-micrometer-long specimens on a hot-film sensor. As the nanotube is shorten, the conductance decreases more than expected by the diffusive thermal conduction theory. We treated two nanotubes of 64nm and 85nm diameters, both of which showed quasi-ballistic phonon transport. This is the first experiment to quantitatively investigate the contribution of phonons with long free paths in multiwalled carbon nanotube. The principle of thermal measurement, amorphous carbon induced by the ion beam, and considerable errors are also explained.
用FIB辐照表征多壁碳纳米管的热输运
测量了单个多壁碳纳米管的热导率作为其长度的函数。在热膜传感器上,利用聚焦离子束将4.8微米长的纳米管缩短为2.4、1.2、0.6和0.3微米长的样品。随着纳米管的缩短,其电导的减小幅度大于扩散热传导理论的预测。我们处理了两个直径为64nm和85nm的纳米管,它们都表现出准弹道声子输运。这是第一个定量研究多壁碳纳米管中长自由程声子贡献的实验。对热测量的原理、离子束诱导的非晶碳和相当大的误差也作了解释。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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