| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1653917 | Materials Letters | 2006 | 4 Pages |
Abstract
Plasma-enhanced chemical vapor deposition (PECVD) was used to grow Fe-catalyzed carbon nanotubes (CNTs). The coiled CNTs were investigated by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The nanotubes were about 10-50 nm in diameter and well beyond 2 μm in length. Field emission properties showed that the turn-on emission threshold field was about 2.5 V/μm with a current density of 0.1 μA/cm2 and the maximal current density reached about 15 μA/cm2 at the electric field of 6.75 V/μm. The FN plots revealed that the field emission of the CNTs followed Fowler-Nordheim behavior. For the work function of CNTs to be 5.0 eV, the field enhancement factor calculated from the slopes of the FN plots was about 7600.
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Authors
J. Jiang, T. Feng, X.H. Cheng, L.J. Dai, G.B. Cao, J.H. Zhang, B.Y. Jiang, X. Wang, X.H. Liu, S.C. Zou,