Atomic-scale imaging of wall-by-wall breakdown and concurrent transport measurements in multiwall carbon nanotubes
Atomic-scale imaging of wall-by-wall breakdown and concurrent transport measurements in multiwall carbon nanotubes
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DOI：
10.1103/physrevlett.94.236802
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发表时间：
2005-06-17
影响因子：
8.6
通讯作者：
Ren, ZF
中科院分区：
文献类型：
--
作者：
Huang, JY;Chen, S;Ren, ZF
我们报道了在装有压电式操纵器的透射电子显微镜中对单个多壁碳纳米管的击穿进行原子尺度成像和同步传输测量。我们意外地发现了三个截然不同的破坏序列：即从最外墙向内，从最内墙向外，以及最内墙和最外墙之间的交替。值得注意的是，当最里面的一面墙被打破时，观察到了大量的电流下降，这明确地证明了每一面墙都是导电的。此外，任何顺序的每个壁的破裂都是在纳米管的中间开始的，而不是在接触处，这证明了传输不是弹道的。
We report the atomic-scale imaging with concurrent transport measurements of the breakdown of individual multiwall carbon nanotubes inside a transmission electron microscope equipped with a piezomanipulator. We found unexpectedly three distinct breakdown sequences: namely, from the outermost wall inward, from the innermost wall outward, and alternatively between the innermost and the outmost walls. Remarkably, a significant amount of current drop was observed when an innermost wall is broken, proving unambiguously that every wall is conducting. Moreover, the breakdown of each wall in any sequence initiates in the middle of the nanotube, not at the contact, proving that the transport is not ballistic.