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Abstract
Zinc oxide nanowires (ZNW) were grown on a vertically-aligned carbon nanotube mesh array (VACM), of which the field emission properties were determined and compared with bare ZNW and bare VACM, respectively. The ZNW–VACM combined structure produced a macroscopic turn-on field of 0.8V/μm and a threshold field of 2.3V/μm, which was found to be much lower than that of bare ZNW. Crucially, field emission from ZNW–VACM was much more stable and uniform than that from bare VACM and exhibits a current fluctuation of less than 0.5% in 80h with a current density of ~1mA/cm2, making it a promising field emitter for field emission backlighting and displays.
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