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Field Emission Properties of Metal Oxide Nanowires

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The metal oxide nanowires were produced by a resistive heating of various metals under ambient conditions at normal atmospheric pressure. The obtained nanowires of CuO, V2O5, ZnO, Fe2O3 were typically of 1–5 μm in length and 10–50 nm in diameter. Field emission properties of the oxidized metal surfaces covered by the nanowires, including current–voltage dependencies and distribution of the emission sites, were measured in a flat diode configuration with the use of a phosphor coated anode. The obtained data on field emission properties were compared with the structural characteristics of the nanowires. The highest efficiency of field emission (with 5 V/μm threshold field at 0.01 mA/cm2 current density) was observed for CuO nanowires. Obtained max- imal current density (up to 100 mA/cm2for such kind of cathodes is very promising for various applications in vacuum electronics.
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Keywords: FIELD EMISSION; METAL OXIDE; NANOWIRE; RESISTIVE HEATING; VACUUM ELECTRONICS

Document Type: Research Article

Publication date: 2012-01-01

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  • Journal of Nanoelectronics and Optoelectronics (JNO) is an international and cross-disciplinary peer reviewed journal to consolidate emerging experimental and theoretical research activities in the areas of nanoscale electronic and optoelectronic materials and devices into a single and unique reference source. JNO aims to facilitate the dissemination of interdisciplinary research results in the inter-related and converging fields of nanoelectronics and optoelectronics.
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