ZnO nanowire arrays grown on the aluminum doped ZnO (AZO) seed layer are generally dense. Thermally annealed metal films such as gold (Au) or copper (Cu) were used to control the densities of zinc oxide (ZnO) nanowire arrays. Needle-like ZnO nanowires with the lengths of over ~4 um were grown on the thermally treated metal films unlike the ZnO nanowires grown on the AZO seed layer. In the case of thermally treated Au films, the density of ZnO nanowire arrays was controlled by changing the annealing temperatures. Growth behaviors and crystallinity of ZnO nanowire arrays grown on thermally treated metal films were investigated. Field emitters were fabricated and characterized by using density controlled and dense ZnO nanowire arrays to evaluate the field emission properties such as turn-on field and Current-density.

Characterization and field emission properties of density controlled ZnO nanowire arrays grown on thermally annealed metal film

244th National Meeting (2012)

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