Abstract
We demonstrate a very efficient synthesis of vertically-aligned ultra-long carbon nanofibers (CNFs) with sharp tip ends using thermal chemical vapor deposition. Millimeter-scale CNFs with a diameter of less than 50 nm are readily grown on palladium thin film deposited Al2O3 substrate, which activate the conical stacking of graphitic platelets. The field emission performance of the as-grown CNFs is better than that of previous CNFs due to their extremely high aspect ratio and sharp tip angle. The CNF array gives the turn-on electric field of 0.9 V/lm, the maximum emission current density of 6.3 mA/cm2 at 2 V/lm, and the field enhancement factor of 2585.
| Original language | English |
|---|---|
| Pages (from-to) | 149-155 |
| Number of pages | 7 |
| Journal | Carbon |
| Volume | 79 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 2014 |
Bibliographical note
Funding Information:This work was supported by the Korea Institute of Science and Technology Institutional Program , International Cooperation of Science & Technology project (KICOS, 2009-00299 ) funded by the Ministry of Education, Science and Technology, the Converging Research Center Program funded by the Ministry of Science, ICT & Future Planning Technology ( 2013K000414 ), and the Graphene Materials/Components Development Project ( 10044366 ) funded by the Ministry of Trade, Industry, and Energy (MOTIE), Republic of Korea.
Publisher Copyright:
© 2014 Elsevier Ltd. All rights reserved.
ASJC Scopus subject areas
- General Chemistry
- General Materials Science