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- W4283165714 abstract "Abstract Field‐emission cold cathodes are the key components of vacuum nanoelectronics that offer great advantages over other electron sources based on the thermionic or photoelectric effects. In the effort to realize new electron sources, a systematic investigation of the field emission (FE) properties of SnO 2 nanofiber networks is performed. High‐purity SnO 2 nanofibers, confirmed by X‐ray photoelectron spectroscopy, are prepared by electrospinning technique and then uniformly distributed over Si wafer. Field emission properties are investigated using a nanomanipulated tip‐shaped anode, inside a scanning electron microscope, for fine tuning the anode‐cathode separation distance. A field‐emission current is observed with an applied electric field as low as 25 V μ m −1 . Performance parameters such as turn‐on field and field enhancement factor are evaluated within the theoretical Fowler–Nordheim framework as a function of the anode–cathode separation distance, demonstrating that a maximum enhancement factor of about 150 is obtained at a separation of 200 nm. The emission from a single nanofiber is characterized by a current saturation at high voltages that can be explained in terms of electron supply limitation within conduction band. No evidence of field emission current contribution by electron tunneling from the valence band is observed in the experimental data." @default.
- W4283165714 created "2022-06-21" @default.
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- W4283165714 date "2022-06-19" @default.
- W4283165714 modified "2023-10-18" @default.
- W4283165714 title "SnO <sub>2</sub> Nanofibers Network for Cold Cathode Applications in Vacuum Nanoelectronics" @default.
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- W4283165714 doi "https://doi.org/10.1002/aelm.202200237" @default.
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