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 | Nanotech 2006 Vol. 1
Technical Proceedings of the 2006 NSTI Nanotechnology Conference and Trade Show, Volume 1
Chapter 2: Carbon Nanotubes |
| | Field emission characteristics of carbon nanofibers grown on the electroplated copper micro-tips | | Authors: | W-Y Sung, W-J Kim, S-M Lee, H-S Yoo, H-Y Lee, S-K Joo and Y-H Kim | | Affilation: | Seoul National University, KR | | Pages: | 190 - 193 | | Keywords: | carbon nano structures, low temperature growth, field emission, | | Abstract: | Carbon nanofibers (CNFs) were synthesized on micro-copper tips by using direct current plasma enhanced chemical vapor deposition of C2H2 and NH3 gas at 480℃. The copper micro-tips were uniformly formed by high current electroplating and were coated with Ti and Cu buffer layers to prevent copper micro-tips from high temperature damage. Nickel thin film deposited on the copper micro-tips coated with Ti and Cu buffer layers used as a catalyst. Figure 1 shows that the copper micro-tips have a straight shape with the length of about 20 ㎛ and diameter of 300-500 nm. Figure 1 also shows CNFs grown on the copper micro-tips. The CNFs have many small protrusions with very small tip radius, which attribute to good field emission characteristics. Figure 2 shows that the turn-on voltage of the CNFs was about 2.7 V/㎛ with an emission current density of 10 ㎂/cm2, and the maximum emission current density of 3.3 mA/cm2 was observed from the area of 0.2827cm2, at the electric field of 6.55 V/㎛. The Fowler-Nordheim plot showed a good linear fit, indicating that the emission current of carbon nanofibers follows a typical Fowler-Nordheim behavior. | | ISBN: | 0-9767985-6-5 |
| Pages: | 871 |
| Hardcopy: | $185.00 |
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