Improvement of field emission uniformity of tungsten oxide nanowire arrays via in-situ plasma treatment

W₁₈O₄₉ nanowires have demonstrated good field emission properties, such as low turn-on filed and high current density. However, their emission uniformity still needs improvement, which is an important issue for large area application such as field emission display. In present study, we reported an in-situ plasma treatment method using Ar and H₂ to improve the emission uniformity of tungsten oxide nanowires. Increase of emission site was observed and the method has proved to be an effective method.