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This paper present the preliminary experimental results of carbon nanotube(CNT) cold cathode arrays using thermal chemical vapor deposition (TCVD). The results of the field emission test show that the current density of carbon nanotube arrays can achieve 2.2A/cm2 with a total emission current of 17.2mA.
The methods and the device of carbon nanotubes which are were prepared by DC -PCVD are described in the paper. The growth characteristics of carbon nanotubes is researched within the substrate temperature from 500 °C to 900 °C when the range of gas is from 60 torr to 90 torr. It is appropriate when the temperature is 700°C and the pressure is 75torr. The growth characteristics of carbon nanotubes...
Carbon nanotubes (CNTs) have excellent performance in field emission; they can be used as field emission (FE) cold cathode. In this paper, we used thermal chemical vapor deposition to synthesize CNTs directly on the surface of traditional thermal-cathode; we changed the sputtering time of catalyst and found that it had a major impact on the emission properties, some discussion were also give.
We report here an effective method for the fabrication of a large number of carbon nanotube (CNT) triode-type micro-cathodes. Our technique combines composite electroplating and micromachining, avoiding the tedious direct growth and the screen-printing procedures conventionally used to fabricate such structures. The emitter structure is characterized by uniform diameters and heights, as well as by...
A simple and low cost method to fabricate gas ionization sensors with CNT/Ni field cathodes on corning glasses using composite plating technique was first developed. The field emission characteristics of the initial CNT/Ni field cathode showed a low turn-on electric field Eon of about 1.2 V/??m with an emission current density of 1 ??A/cm2.It was found that the breakdown voltage (Vb) of the H2 gas...
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