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- W3126522182 abstract "Cesium adsorption on oxygenated and oxidized W(110) is studied by Auger electron spectroscopy, LEED, thermal desorption and work function measurements. For oxygen coverages up to 1.5 × 1015 cm−2 (oxygenated surface), preadsorbed oxygen lowers the cesiated work function minimum, the lowest (∼1 eV) being obtained on a two-dimensional oxide structure with 1.4 × 1015 oxygen atoms per cm2. Thermal desorption spectra of neutral cesium show that the oxygen adlayer increases the cesium desorption energy in the limit of small cesium coverages, by the same amount as it increases the substrate work function. Cesium adsorption destroys the p(2 × 1) and p(2 × 2) oxygen structures, but the 2D-oxide structure is left nearly unchanged. Beyond 1.5 × 1015 cm−2 (oxidized surface), the work function minimum rises very rapidly with the oxygen coverage, as tungsten oxides begin to form. On bulk tungsten oxide layers, cesium appears to diffuse into the oxide, possibly forming a cesium tungsten bronze, characterized by a new desorption state. The thermal stability of the 2D-oxide structure on W(110) and the facetting of less dense tungsten planes suggest a way to achieve stable low work functions of interest in thermionic energy conversion applications." @default.
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- W3126522182 date "1980-02-01" @default.
- W3126522182 modified "2023-10-18" @default.
- W3126522182 title "Interaction of cesium and oxygen on W(110)" @default.
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- W3126522182 doi "https://doi.org/10.1016/0039-6028(80)90246-0" @default.
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