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- W2275367795 abstract "The effects of nitrogen functionalization on the field emission properties of vertically aligned few-layer graphene (FLG) nanowall thin films are investigated. Lowered work function and enhanced electron emission property are observed after ammonia plasma treatment. The turn-on field (defined at 10 μAcm−2) is found to be decreased from 6.5 to 4.6 Vμm−1. Additionally, more stable emission with fluctuation less than 5% is obtained after surface N-functionalization. The electron configuration of nitrogen in FLG edge is proposed to be amine (C–NH2) terminal configuration. Nitrogen doping could significantly increases the π density states near the Fermi level. The maximum upward shift of EF is determined to be ∼0.23 eV by low-energy XPS measurements, which mainly accounts for the lower turn-on electric field. Meanwhile, nitrogen functionalization would minimize surface desorption and accounts for more uniform work function distribution. Finally, the nonlinear characteristics of Fowler–Nordheim plots could be understood by thermionic-field emission process." @default.
- W2275367795 created "2016-06-24" @default.
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- W2275367795 date "2016-07-01" @default.
- W2275367795 modified "2023-10-05" @default.
- W2275367795 title "Surface nitrogen functionality for the enhanced field emission of free-standing few-layer graphene nanowalls" @default.
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- W2275367795 doi "https://doi.org/10.1016/j.jallcom.2016.01.265" @default.
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