Effect of length and spacing of vertically aligned carbon nanotubes on field emission properties

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 ca...

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Veröffentlicht in:Applied physics letters 2003-05, Vol.82 (20), p.3520-3522
Hauptverfasser: Jo, S. H., Tu, Y., Huang, Z. P., Carnahan, D. L., Wang, D. Z., Ren, Z. F.
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container_end_page 3522
container_issue 20
container_start_page 3520
container_title Applied physics letters
container_volume 82
creator Jo, S. H.
Tu, Y.
Huang, Z. P.
Carnahan, D. L.
Wang, D. Z.
Ren, Z. F.
description 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.
doi_str_mv 10.1063/1.1576310
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title Effect of length and spacing of vertically aligned carbon nanotubes on field emission properties
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