Abstract
A bundle of carbon nanofibers (CNFs) was successfully obtained on a glass substrate through a plasma enhanced chemical vapor deposition (PECVD) process. CNFs having dimensions of 100 nm in diameter and 1 μm in length nucleated on the Ni-Cr catalysis and grew selectively in a circular area 3 μm in diameter with a number density of 50 in 1 μm2. PECVD was used with mixed source gases of CH4VH2/He and a substrate temperature of less than 743 K which was lower than the transition temperature of glass substrate. Each CNF had a nanostructure of a stacked cup-cone shaped graphite shells with a Ni-Cr nanoparticle surmounted at the top. The field emission characteristics of the CNF bundle were also evaluated up to 3 μA at 130 V and the maximum in the current-voltage relation was converted to a Fowler-Nordheim (F-N) plot using a work function value of 5.0 eV for CNF which showed an explicit linear F-N relation. This means a CNF bundle is a candidate element for two dimensional field emitter devices.
| Original language | English |
|---|---|
| Pages (from-to) | 437-439 |
| Number of pages | 3 |
| Journal | Journal of Ceramic Processing Research |
| Volume | 9 |
| Issue number | 5 |
| Publication status | Published - 2008 Dec 15 |
Keywords
- Carbon nanofiber
- CNF bundle
- F-N plot
- Field emitter
- PECVD
ASJC Scopus subject areas
- Ceramics and Composites