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

Intensive investigation on WO3−x nanostructures has been carried out in the last decade because they possess extraordinary properties [1]. Especially for application in field emission, W18O49 nanostructures have exhibited excellent performance [2]. 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.