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

Yang Doo Lee, Jung Wan Yu, Woo Sung Cho, Yong Churl Kim, In Taek Han, Yun Hi Lee, Byeong Kwon Ju

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


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.

Original languageEnglish
Pages (from-to)1131-1136
Number of pages6
Issue number4
Publication statusPublished - 2010 Apr

Bibliographical note

Funding Information:
This research were supported by Seoul Metropolitan Government though Seoul research and business development (Grant No. CR070054 ), Samsung Advanced Institute of Technology and partially by Ministry of Knowledge Economy of Korea Government (No. 10029846-2008-02 ). We also thank the Korea Basic Science Institute for the use of TEM.

Copyright 2010 Elsevier B.V., All rights reserved.

ASJC Scopus subject areas

  • General Chemistry
  • General Materials Science


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