Effect of length and spacing of vertically aligned carbon nanotubes on field emission properties
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- 19 May 2003
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 82 (20) , 3520-3522
- https://doi.org/10.1063/1.1576310
Abstract
The length and the spacing of carbon nanotube (CNT) films are varied independently to investigate their effect on the field-emission characteristics of the vertically aligned CNT films grown by plasma-enhanced hot filament chemical vapor deposition using pulsed-current electrochemically deposited catalyst particles. It is shown that, in general, the macroscopic electric field Emac,1, defined as the electric field when the emission current density reaches 1 mA/cm2, can be reduced by increasing the length and the spacing of CNTs. However, for the very-high-density CNT films, the increase of length increases Emac,1 slightly, whereas for the very short CNT films, the increase of spacing does not effectively reduce Emac,1.Keywords
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