Figure 1

(a) Variation in the electrical conductivity (solid stars) and turn-on field (closed circles) as a function of the dosage of Ag ions implanted in the UNCD films. (b) The electron field emission properties of various dosages of Ag-ion implanted and post-annealed UNCD films. The inset of (b) shows the corresponding Fowler Nordheim (F‒N) plots.