Figure 2

Figure 2: (a) SEM of single-gated isolated VA-CNT. (b) The solution of the electric field for an emitter with 15-nm tip radius, 2-µm height, and 1-µm gate aperture. A field factor (βG)   of 7.35x105 V/cm is obtained. (c) The Fowler-Nordheim plot   for an array of ~10,000 emitters. A field factor (βG) of 7.8x105 V/cm is calculated.