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• W2019860571 abstract "Field emission from multihead silicon (Si) cones was substantially improved by cesium (Cs) coating. Increasing the Cs coating lowered the emission turn-on field (for 10 μA/cm2) from 25 V/μm to a saturated value of 13 V/μm, while the threshold field (for 10 mA/cm2) decreased by 30%, dropping from 27 V/μm for Si cones coated with 1.8 monolayers (ML) of Cs to a saturated value of 19 V/μm with 4.1 ML of Cs. The Cs-treated Si cones could give an emission current density that was three to ten times that delivered by bare Si cones. The work function reduced by a factor of 1.43 for Si cones coated with 4.9 ML of Cs with reference to the untreated Si cones. From the slope of Fowler–Nordheim plot, the field enhancement factor β was found to increase by a factor of 2.02 for Si cones coated with 2.5 ML of Cs and then reduce to 1.57 after the 4.9 ML of Cs deposition. Reduction of the factor β might occur because of a thick Cs layer, which could flatten the sharp cone features. Stability test showed that no current decay was observed at a current density of 0.8 mA/cm2 under a constant applied field of 16 V/μm during the 10 h investigation." @default.
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• W2019860571 date "2002-02-04" @default.
• W2019860571 modified "2023-10-14" @default.
• W2019860571 title "Field-emission properties of multihead silicon cone arrays coated with cesium" @default.
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• W2019860571 doi "https://doi.org/10.1063/1.1446990" @default.
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