Fabrication of patterned aligned W18O49 nanowire arrays with high field emission performances

Intensive investigation on WO_3-x nanostructures has been carried out in the last decade because they possess extraordinary properties. Especially for application in field emission, W₁₈O₄₉ nanostructures have exhibited excellent performance. Some issues have to be addressed in fabricating vacuum microelectronic devices using W₁₈O₄₉ nanostructures, including how to realize well aligned nanostructure arrays with uniform phase and selected-area growth. Therefore, developing new approaches to synthesize patterned W₁₈O₄₉ nanostructure arrays is very necessary. Here, we report the controlled growth of patterned and aligned W₁₈O₄₉ nanowires by a simple lift-off technique.