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Rectifying "nanohomo" contacts of W-Ga-C composite pad and nanowire fabricated by focused-ion-beam induced chemical vapour deposition

Li, W and Shen, T 2005, 'Rectifying "nanohomo" contacts of W-Ga-C composite pad and nanowire fabricated by focused-ion-beam induced chemical vapour deposition' , Applied Physics Letters, 87 (12) , p. 123113.

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Abstract

We prepared W-Ga-C composite contacts on W-Ga-C composite nanowires by focused-ion-beam-induced chemical vapor deposition using a dual-beam scanning electron microscope/focused-ion-beam system. The current-voltage (I-V) characteristics of wires were found to change from nonlinear to linear with increasing wire thickness. For wires with small dimensions, which result in strong nonlinear I-V behavior at room temperature, pairs of contacts were fabricated along the wire under different ion energies and scanning modes. Nonlinear and asymmetric rectifying I-V characteristics were observed. The results suggest that nanoscaled W-Ga-C nanowires may behave similarly to semiconductors and that the contact characteristics may be modified using different deposition conditions. Furthermore, ohmiclike junctions could be formed through the use of specific deposition conditions for the contact pads and nanowires.

Item Type: Article
Uncontrolled Keywords: Tungsten compounds, gallium compounds, composite materials, rectification, nanowires, focused ion beam technology, chemical vapour deposition, electrical contacts, scanning electron microscopy
Themes: Subjects / Themes > Q Science > QC Physics
Subjects outside of the University Themes
Schools: Colleges and Schools > College of Science & Technology
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Materials & Physics Research Centre
Journal or Publication Title: Applied Physics Letters
Publisher: American Institute of Physics
Refereed: Yes
ISSN: 00036951
Related URLs:
Depositing User: H Kenna
Date Deposited: 23 Aug 2007 14:32
Last Modified: 20 Aug 2013 15:47
URI: http://usir.eprints.org/id/eprint/354

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