Atomistic dynamics of deformation, fracture, and joining of individual single-walled carbon nanotubes
Atomistic dynamics of deformation, fracture, and joining of individual single-walled carbon nanotubes
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DOI：
10.1103/physrevb.72.115431
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发表时间：
2005-09
影响因子：
3.7
通讯作者：
K. Asaka;T. Kizuka
中科院分区：
文献类型：
--
作者：
K. Asaka;T. Kizuka
采用透射电子显微镜结合扫描探针显微镜的功能，对单壁碳纳米管（SWCNTs）的拉伸变形过程进行了原位观察。SWCNTs断裂时的Young’s模量、拉应力和应变分别为$950\ifmmode\pm\else\textpm\fi{}130\phantom{\rule{0.3em}{0ex}}\ mathm {GPa}$、$25\ifmmode\pm\else\ mathm \fi{}1\phantom{\rule{0.3em}{0ex}}\ mathm {GPa}$和$0.30\ifmmode\pm\else\textpm\fi{}0.03$。结果表明，在压缩力和偏置电压作用下，断裂的SWCNTs的两个尖端可以通过接触恢复成单管状结构。原位观察也证实了SWCNTs断裂过程中碳单原子丝的形成。
The tensile deformation process of individual single-walled carbon nanotubes (SWCNTs) was in situ observed with measurements of the mechanical properties by transmission electron microscopy combined with the functions of scanning probe microscopy. The values of Young's modulus, tensile stress and strain at the fracture of SWCNTs are $950\ifmmode\pm\else\textpm\fi{}130\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$, $25\ifmmode\pm\else\textpm\fi{}1\phantom{\rule{0.3em}{0ex}}\mathrm{GPa}$, and $0.30\ifmmode\pm\else\textpm\fi{}0.03$, respectively. It was shown that two tips of fractured SWCNTs can be recovered to produce a single tubular structure by contact under compressive force and bias voltage. The in situ observations also demonstrated the formation of carbon monatomic wires during the fracture process of SWCNTs.