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- Title
Field emission properties of carbon nanotube pastes examined using design of experiments.
- Authors
Darsono, Nono; Sung-Wook Kwon; Dang-Hyok Yoon; Jaemyung Kim; Moon, Heesung; Park, Seoung-Uk
- Abstract
Field emission properties of screen-printed carbon nanotube (CNT) pastes were investigated by design of experiments (DOE) using three, two-level, input factors. Characterization showed that the multi-walled carbon nanotubes (MWNTs) with a diameter of approximately 5 nm containing 5 wt. % of carbonaceous impurities were almost completely burnt out after heating to 600°C in air, while 96% of the sample remained even up to 800°C in a nitrogen atmosphere. Experimental measurements using a diode structure for eight sample groups revealed an emission current density of 52–87 μA/cm2 in an electric field of 5 V/ μA and a field enhancement factor of 12,079–16,922, assuming the work function of MWNTs to be 5 eV, thereby demonstrating superior emission properties with the sample containing a larger amount of MWNTs. A long-term, 110-h reliability test showed a stable emission property with a half-life of 6,000 h.
- Subjects
FIELD emission cathodes; CARBON nanotubes; HEATING control; NITROGEN; EMISSION control; ELECTROMAGNETIC fields; ELECTRON-tube diodes; EXPERIMENTAL design; ELECTRONICS
- Publication
Journal of Materials Science: Materials in Electronics, 2008, Vol 19, Issue 1, p17
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-007-9265-x