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In this paper, the effects of catalyst film thickness on the field emission currents and the emission stability of carbon nanotubes (CNTs) are presented. The CNTs are grown on Ni catalyst films of different thickness (20 nm, 50 nm, 70 nm) by chemical vapor deposition (CVD). Results show that the CNTs grown on 20 nm catalyst films have a poorer field emission and poorer emission stability than those...
An efficient method is used to improve the emission stability and uniformity of the field emission from a carbon nanotube (CNT) cathode. In this method, a fully sealed device with CNTs cathode is exhausted by a pumping system. At the same time, this device is baking at a temperature about 400degC and maintains for a few minutes, and an overload current is applied. The overload current can burn the...
Field emission display (FED) is a kind of vacuum electron device, and its principle is very similar to that of a traditional cathode ray tube (CRT). The display performances of a FED, such as emission current and the driving voltage, are determinated largely by the field emitters. Besides the emission characteristic, the geometric factors, thermal stability and ambient insensitivity of the field emitter...
This paper reports the development and the operation of field emitters with low turn on electric field based on carbon fibres. Field emitters of vertical carbon fibres on silicon substrate were fabricated by the catalyst chemical vapor deposition. The diameter of the fibres is about 3~4 mum and the height is larger than 1 mm. After one aging process of 150 minutes, field emission measurements of carbon...
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