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(a) FESEM micrograph of nanorods which emerge from grain boundaries of on , (b) FESEM micrograph of nanorods grown on the wafer which was presputtered with a layer of metal.
The bright field TEM images of three nanorods. The inset shows the electron diffraction pattern of the upper section of the left rod.
The current density vs the electric field of nanorods grown on the substrate precoated with a copper layer. The inset is the Fowler–Nordheim plot.
The emission current density vs time. The emission current stability experiment was carried out under high vacuum .
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