Field emission properties of vertically aligned gold nanowires of different aspect ratios and spatial distribution are presented. The nanowires were electrochemically deposited into the pores of etched ion-track polymer membranes. High emission site densities up to 5.7×10~5cm~(-2) based on a controlled field enhancement β of individual emitting sites were observed by means of field emission scanning microscopy. Local measurements reveal stable Fowler-Nordheim behavior of the emitters up to currents of 100 μA. The integral emission of Au nanowires cathodes for device application is also discussed.
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