Molecular junctions by joining single-walled carbon nanotubes
Molecular junctions by joining single-walled carbon nanotubes
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DOI：
10.1103/physrevlett.89.075505
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发表时间：
2002-08-12
影响因子：
8.6
通讯作者：
Ajayan, PM
中科院分区：
文献类型：
--
作者：
Terrones, M;Banhart, F;Ajayan, PM
交叉的单壁碳纳米管可以通过电子束焊接连接形成分子结。在透射电子显微镜中原位产生各种几何形状的稳定结。在高温下的电子束曝光诱导的结构缺陷，促进通过悬挂键的交联连接的管。分子动力学模拟结果表明，空位和碳原子的产生诱导形成了涉及管之间表面的七元或八元碳环的结。
Crossing single-walled carbon nanotubes can be joined by electron beam welding to form molecular junctions. Stable junctions of various geometries are created in situ in a transmission electron microscope. Electron beam exposure at high temperatures induces structural defects which promote the joining of tubes via cross-linking of dangling bonds. The observations are supported by molecular dynamics simulations which show that the creation of vacancies and interstitials induces the formation of junctions involving seven- or eight-membered carbon rings at the surface between the tubes.