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We report for the first time field electron emission investigations on few layered black phosphorous nanosheets emitter's synthesized using chemical method with thickness ∼ 2–5 nm. The turn-on electric field required to draw an emission current density of ∼10 µA/cm2 was found to be ∼ 4.2 V/µm. Furthermore, a few layer black phosphorous nanosheets emitter deliver an large emission current density of...
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