| Summary: | 碩士 === 國立臺灣科技大學 === 工程技術研究所材料科技學程 === 87 === Due to their high aspect ratios and small tip radii of curvature, carbon nanotubes possess marvelous electron field emission properties, viz. low turn-on voltage (E0) and large emission current density (Je), and have good potential for using as materials in electron emitters of flat panel display.
In this work, we use the technology of DC arc-discharge to grow carbon nanotubes. The optimal grow condition is based on the study of the field emission characteristic of carbon nanotubes, and the relationship between the rate of grow carbon nanotubes and the field emission characteristic of carbon nanotubes. Using this optimal grow condition, it is easy to produce a great mass carbon nanotubes.
We use the screen printing technology to fabricate the carbon nanotube field emitters. Science carbon nanotubes are always buried in paste, in order to expose their tips, a Ar plasma treatment is conducted to polish sample surface. The optimal condition of Ar plasma dry etching is found for different pastes. As a result, the turn on voltage is lower than 1V/m, and the field emission current density is larger than 6000A/cm2.
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