Nano Archive

Nanorobotic spot welding: Controlled metal deposition with attogram precision from copper-filled carbon nanotubes

Dong, Lixin and Tao, Xinyong and Zhang, Li and Zhang, Xiaobin and Nelson, Bradley J. (2007) Nanorobotic spot welding: Controlled metal deposition with attogram precision from copper-filled carbon nanotubes. NANO LETTERS, 7 (1). pp. 58-63.

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Official URL: http://dx.doi.org/10.1021/nl061980%2B

Abstract

With the continuing development of bottom-up nanotechnology fabrication processes, spot welding can play a role similar to its macro counterpart for the interconnection of nano building blocks for the assembly of nanoelectronics and nanoelectromechanical systems (NEMS). Spot welding using single-crystalline copper-filled carbon nanotubes (CNTs) is investigated experimentally using nanorobotic manipulation inside a transmission electron microscope (TEM). Controlled melting and flowing of copper inside nanotube shells are realized by applying bias voltages between 1.5 and 2.5 V. The average mass flow rate of the copper was found to be 120 ag/s according to TEM video imaging (measured visually at approximately 11.6 nm/s through the CNT). Successful soldering of a copper-filled CNT onto another CNT shows promise for nano spot welding and thermal dip-pen lithography.

Item Type:Article
Subjects:Physical Science > Nanophysics
Material Science > Nanofabrication processes and tools
Physical Science > Nano objects
ID Code:3238
Deposited By:Anuj Seth
Deposited On:13 Jan 2009 17:18
Last Modified:20 Jan 2009 15:51

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