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(a) Top-view SEM, (b) cross-section SEM, (c) higher magnification SEM, and (d) TEM images of typical carbon nanosheets.
(Color online) Field emission current density vs applied electric field for carbon nanosheet sample. Inset: the corresponding Fowler-Nordheim plot.
(Color online) Maximum emission current vs time for carbon nanosheet sample 1 (at and each cycle time of ), and sample 2 [inset (a), at and each cycle time of ]. Inset: (b) field emission current vs applied electric field for sample 1 at lifetimes of 10 and , respectively.
(Color online) Emission current vs backgate voltage. Inset: (a) schematic illustration of the carbon nanosheet-based backgated triode emission device and (b) carbon nanosheets grown on the line cathode of the device.
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