Multi-walled carbon nanotube/ribonucleic acid hybrid field emitters fabricated by spray deposition

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...

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Bibliographic Details
Published in:Carbon (New York) 2010-04, Vol.48 (4), p.1131-1136
Main Authors: Lee, Yang Doo, Yu, Jung-Wan, Cho, Woo-Sung, Kim, Yong Churl, Han, In Taek, Lee, Yun-Hi, Ju, Byeong-Kwon
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
Materials science
Physics
Specific materials
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Summary: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.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2009.11.035