| CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES |
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Current Density-Sensitive Welding of a Semiconductor Nanowire to a Metal Electrode |
| TAN Yu1, WANG Yan-Guo2** |
1 Science College, Hunan Agricultural University, Changsha 410128
2Beijing Laboratory of Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, P. O. Box 603, Beijing 100190
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| Cite this article: |
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TAN Yu, WANG Yan-Guo 2013 Chin. Phys. Lett. 30 017901 |
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Abstract In situ welding of a single ZnSe nanowire (NW) to an Au electrode has been successfully achieved by means of current-induced Joule heating. The parameter governing the welding of semiconductor NW to the metal electrode is highly dominated by the current density at the Au-ZnSe NW (M-S) contact because current density at the M-S contact can change the temperature profile along the NW. The self-heating behaviors of the Au-ZnSe NW-Au (M-S-M) nanostructure can be changed from the electrical failure of the ZnSe NW to the melting of the Au electrode localized at the M-S contact when the current density at the M-S junction was adjusted to be larger than in the NW. Consequently, the self-welding is the current density-sensitive and controllable since the current density at the M-S contact can be controlled by adjusting the contact area between the NW and metal electrode. This controlled self-welding may have potential applications in the construction of a complex nanostructure and improvement of the thermal stability of the M-S contact as well as the enhanced performance of the nanodevices based on the M-S-M nanostructure.
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Received: 23 August 2012
Published: 04 March 2013
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| PACS: |
79.70.+q
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(Field emission, ionization, evaporation, and desorption)
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68.37.Hk
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(Scanning electron microscopy (SEM) (including EBIC))
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81.07.De
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(Nanotubes)
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