Journal
APPLIED PHYSICS LETTERS
Volume 82, Issue 20, Pages 3520-3522Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1576310
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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 E-mac,E-1, defined as the electric field when the emission current density reaches 1 mA/cm(2), 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 E-mac,E-1 slightly, whereas for the very short CNT films, the increase of spacing does not effectively reduce E-mac,E-1. (C) 2003 American Institute of Physics.
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