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Field electron emission from an aluminum oxide covered tungsten {112} plane at temperatures up to 1700°K

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Abstract

Field electron emission from an aluminum oxide mono-layer, face specifically adsorbed on a tungsten {112} plane, was measured between 1670°K and room temperature and at local field strength ranging from 17 MV/cm to 35 MV/cm. In a Fowler-Nordheim plot straight lines were obtained up to about 820°K. The work function at 650°K was determined to be 3.2 eV. The experimental values were compared with those determined by Christov's unified theory of field and thermionic emission. Deviations are attributed to the change in the shape of the potential barrier, which is caused by the aluminum oxide adsorption.

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  1. Department of Chemistry and Laboratory for Surface Studies, University of Wisconsin-Milwaukee, 53201, Milwaukee, Wisconsin, USA

    R. Vanselow

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  1. R. Vanselow
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Vanselow, R. Field electron emission from an aluminum oxide covered tungsten {112} plane at temperatures up to 1700°K. Appl. Phys. 2, 229–235 (1973). https://doi.org/10.1007/BF00889504

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