Low-field electron emission from pinaster-like MoO₂ nanoarrays as two-stage emitters

Low-field electron emission is obtained from the pinaster-like MoO_2 nanoarrays. The turn-on field of the pinaster-like MoO_2 nanoarrays is found to be as low as 2.39 V/\mu m with the current density of 10 \mu A/cm^2. The enhancement factor is extracted to be 3590 from the Fowler--Nordheim plot. These excellent emission properties are attributed to the special structure of the pinaster-like MoO_2 nanoarrays and confirmed by the calculation in the frame of the two -stage model. Our results show that the pinaster-like MoO_2 nanoarrays are promising candidate in realizing field emission displays.