Carbon nanotube growth for field-emission cathodes from graphite paste using Ar-ion bombardment
- Department of Electrical and Computer Engineering, University of California, One Shields Avenue, Davis, California 95616 (United States)
Multiwall carbon nanotubes (MW-CNT) have been synthesized from solid-phase graphite. The graphite is deposited as a thick-film paste and irradiated with a 1.2 keV flood Ar-ion beam, transforming the graphite surface to a composite of MW-CNT embedded in the graphite matrix. Micro-Raman measurements have verified that the nanotubes are metallic in nature. The technique was used to make printed field-emission cathodes. Emission from these cathodes demonstrates Fowler-Nordheim tunneling characteristics. The irradiated film emits at an extraction field of 5.0 V/{mu}m, which is less than one-sixth of the minimum extraction field of the nonirradiated graphite film, and exhibit lower noise and greater emission uniformity.
- OSTI ID:
- 20702376
- Journal Information:
- Applied Physics Letters, Vol. 86, Issue 16; Other Information: DOI: 10.1063/1.1899236; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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