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Multi-walled carbon nanotube/ribonucleic acid hybrid field emitters fabricated by spray deposition
- Authors
- Lee, Yang Doo; Yu, Jung-Wan; Cho, Woo-Sung; Kim, Yong Churl; Han, In Taek; Lee, Yun-Hi; Ju, Byeong-Kwon
- Issue Date
- 4월-2010
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Keywords
- Carbon nanotube; RNA; spray deposition; field emission; X-ray source
- Citation
- CARBON, v.48, no.4, pp.1131 - 1136
- Indexed
- SCIE
SCOPUS
- Journal Title
- CARBON
- Volume
- 48
- Number
- 4
- Start Page
- 1131
- End Page
- 1136
- ISSN
- 0008-6223
- Abstract
- Multi-walled carbon nanotubes (MWCNTs) are shown to disperse in water, and be functionalized using RNA so that MWCNT/RNA hybrids can be fabricated on substrates by spray method. The material has strong adhesion on glass substrates or metal wires. A liquid elastomer surface treatment is used to make the field emitter tips protrude from the cathode. Possible methods of realizing field emitter sources, including X-ray sources, are discussed. The MWCNT/RNA hybrids have a higher emission current density and more uniform emission image than the MWCNTs on their own, since the RNA coated MWCNTs attach more strongly to the substrate. A diode configuration field emission X-ray source using the MWCNT/RNA hybrids on tungsten wire tip was tested and found to provide clear X-ray images. (C) 2009 Elsevier Ltd. All rights reserved.
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