Synthesis and field-emission properties of the tungsten oxide nanowire arrays

High-density, uniformly distributed and quasi-aligned tungsten oxide nanowire arrays have been synthesized by a conventional thermal evaporation approach on indium tin oxide (ITO) coated glass substrates without any catalysts. The temperature of the substrate was View the MathML source. The tungsten oxide nanowires are single crystalline with growth direction of [0 1 0]. For commercial applications, field emission properties of tungsten oxide nanowires were studied under a poor vacuum at room temperature. The electron field-emission turn-on field (Eto), defined as the macroscopic field required to produce a current density of View the MathML source, is about View the MathML source. The performance reveals that the tungsten oxide nanowire arrays can be served as a good candidate for commercial application in field-emission displays.