Abstract
CeO2 nanowires are successful synthesized by hydrothermal methodand their field emission (FE) properties are investigated. The turn-onelectric field is 5.8 V/μm at an emitter–anode spacing of 700 μm. TheFE current is stable and the current fluctuations are less than 3%over 5 h. All the plotted Fowler–Nordheim curves yield straightlines, which are in agreement with the Fowler–Nordheim theory. Therelationship between the field enhancement factor β and theemitter–anode spacing d follows a universal equation. Our resultsimply that the CeO2 nanowires are promising materials forfabricating FE cathodes.
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