FIELD EMISSION AND APPLICATION OF CARBON NANOTUBES

Author:

LIM SEONG CHU1,LEE KYU2,LEE IL HA3,LEE YOUNG HEE4

Affiliation:

1. Center for Nanotubes and Nanostructured Composites, Sungkyunkwan University, Suwon 440-746, R. O. Korea

2. Department of Physics, Center for Nanotubes and Nanostructured Composites, Sungkyunkwan University, Suwon 440-746, R. O. Korea

3. Center for Nanotubes and Nanostructured Composites, Sungkyunkwan University Advanced Institute of Nanotechnology, Sungkyunkwan University, Suwon 440-746, R. O. Korea

4. Department of Physics, Center for Nanotubes and Nanostructured Composites, Sungkyunkwan University Advanced Institute of Nanotechnology, Sungkyunkwan University, Suwon 440-746, R. O. Korea

Abstract

The mechanism of field emission from a metal surface was well explained based on the quantum mechanics in early 20th century. Since then, various materials have been studied for field emitters. However, so far, we have been using only limited materials as a field emitter and an application in some area requires further scientific understandings and technological advancements. In this paper, we review the current status of researches in field emission and emission phenomena of carbon nanotubes (CNTs). This may include current saturation induced by gas adsorbates, screening effects, high current emission, degradation of emitter, and field enhancement factor. We also introduce the present status in the development of various CNT-based field emission devices and discuss their performances. In this part, various potential applications such as field emission display, ionization gauge, X-ray gun, and lamp will be presented.

Publisher

World Scientific Pub Co Pte Lt

Subject

Condensed Matter Physics,General Materials Science

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