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A thermo-enhanced field emission phenomenon was observed from ZnO nanowires. The field emission current increased by almost two orders of magnitude under a constant applied electric field, and the turn-on field decreased from 6.04MV/m to 5.0MV/m when the temperature increased from 323 to 723K. The Poole–Frenkel electron excitation from the defect-induced trapping centers to the conduction band under...
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