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Park, Young-Bin
Functional Intelligent Materials Lab (FIMLab)
Research Interests
  • Composites
  • Nanocomposites
  • Smart Materials and Structures
  • Carbon Nanomaterials

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Effect of few-walled carbon nanotube crystallinity on electron field emission property

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Title
Effect of few-walled carbon nanotube crystallinity on electron field emission property
Author
Jeong, Hae DeukLee, Jong HyeikLee, Byung GapJeong, Hee JinLee, Geon-WoongBang, Dae SukCho, DonghwanPark, Young-BinJhee, Kwang Hwan
Issue Date
2011-12
Publisher
KOREAN CARBON SOCIETY
Citation
CARBON LETTERS, v.12, no.4, pp.207 - 217
Abstract
We discuss the influence of few-walled carbon nanotubes (FWCNTs) treated with nitric acid and/or sulfuric acid on field emission characteristics. FWCNTs/tetraethyl orthosilicate (TEOS) thin film field emitters were fabricated by a spray method using FWCNTs/TEOS sol one-component solution onto indium tin oxide (ITO) glass. After thermal curing, they were found tightly adhered to the ITO glass, and after an activation process by a taping method, numerous FWCNTs were aligned preferentially in the vertical direction. Pristine FWCNT/ TEOS-based field emitters revealed higher current density, lower turn-on field, and a higher field enhancement factor than the oxidized FWCNTs-based field emitters. However, the unstable dispersion of pristine FWCNT in TEOS/N,N-dimethylformamide solution was not applicable to the field emitter fabrication using a spray method. Although the field emitter of nitric acid-treated FWCNT showed slightly lower field emission characteristics, this could be improved by the introduction of metal nanoparticles or resistive layer coating. Thus, we can conclude that our spray method using nitric acid-treated FWCNT could be useful for fabricating a field emitter and offers several advantages compared to previously reported techniques such as chemical vapor deposition and screen printing.
URI
https://scholarworks.unist.ac.kr/handle/201301/20624
URL
http://carbonlett.org/PublishedPaper/year_abstract.asp?idx=23
DOI
10.5714/CL.2011.12.4.207
ISSN
1976-4251
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