Electrical Characterization of Tungsten Oxide Nanowires

Details: Category: Tungsten Information; Published on Friday, 06 February 2015 16:46; Written by cq; Hits: 1481

Compared with other transition metal oxides, tungsten oxides have attracted great attention and have been investigated extensively due to their outstanding electrochromic, optochromic, and gaschromic properties. With those distinctive properties, tungsten oxides have been used to make at panel displays, photoelectrochromic smart windows and gas sensors. Non-fully oxidized tungsten oxides (WO3-x), such as W20O58, W18O49 and WO2, are of particular interest because of their unique electronic characteristics, e.g. tungsten oxide has been found to be a semiconductor, a conductor or a superconductor in different oxidization states.

The W18O49 nanowires are synthesized on the tungsten rod substrate by the CVD reaction in which tin powders are used to control oxygen concentration in the furnace and to aid the nanowires to grow. An appropriate flow rate of Ar and an extremely low oxygen concentration are essential for the W18O49 nanowire formation, which is still in the framework of the VS mechanism. The W18O49 nanowires may have potential applications in electronic nanodevices.

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