Fabrication and Electrical and Mechanical Properties of Carbon Nanotube Interconnections


  • The authors are grateful for the support by the Ministry of Science and Technology (Grant No 001CB610502), National Science Foundation of China (Grant Nos 10434010 and 90206021), the Chinese Ministry of Education (Key Project, Grant No 10401), and the National Center for Nanoscience and Technology of China.


Individual carbon nanotubes (CNTs) have been cut, manipulated, and soldered via electron-beam-induced deposition of amorphous carbon (a-C) and using a scanning tunneling microscope inside a transmission electron microscope. All CNT structures, including simple tube–tube connections, crossed junctions, T-junctions, zigzag structures, and even nanotube networks, have been successfully constructed with a high degree of control, and their electrical and mechanical properties have been measured in situ inside the transmission electron microscope. It is found that multiple CNTs may be readily soldered together with moderate junction resistance and excellent mechanical resilience and strength, and the junction resistance may be further reduced by current-induced graphitization of the deposited a-C on the junction.