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Applied Surface Science 2011, Vol. 257 (7) :2850 -2853 doi:10.1016/j.apsusc.2010.10.079 <<-上一篇 下一篇 ->>
Modification of interface structure and contact resistance between a;carbon nanotube and a gold electrode by local melting
Asaka, Koji;Karita, Motoyuki;Saito, Yahachi
[Asaka, Koji; Karita, Motoyuki; Saito, Yahachi] Nagoya Univ, Grad Sch Engn, Dept Quantum Engn, Chikusa Ku, Nagoya, Aichi 4648603, Japan.
Abstract: The electrical connection between a multiwalled carbon nanotube (MWNT) and a gold electrode on applying an electric current was studied by performing in situ transmission electron microscopy observations while simultaneous measuring the bias voltage and the electric current. The tip of the MWNT was brought into contact with the gold surface. When a current density of similar to 10(8) A/cm(2) flowed through the contact, the gold surface started to melt along the surface of the MWNT tip due to Joule heating. At about twice the current density, a drastic change was observed in the structure of the gold surface in the contact region. This structural change increased the contact area between the MWNT tip and gold, which reduced the electrical contact resistance. (C) 2010 Elsevier B. V. All rights reserved.
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