TITLE

Freestanding vertically aligned arrays of individual carbon nanotubes on metallic substrates for field emission cathodes

AUTHOR(S)
Mauger, M.; Binh, Vu Thien; Levesque, A.; Guillot, D.
PUB. DATE
July 2004
SOURCE
Applied Physics Letters;7/12/2004, Vol. 85 Issue 2, p305
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Direct growth of individual and vertically aligned carbon nanotubes (CNTs) onto a metallic tip apex using a two-chamber radio-frequency plasma-enhanced chemical vapor deposition is reported. Individual Ni nanocatalysts, obtained by a sol–gel combustion technique, were dots for the nucleation of individual CNTs that were freestanding, clean, and vertically aligned by the presence of a controlled applied field. The arrays of CNTs obtained, having a low-density spatial distribution to avoid mutual electrostatic field screening, gave uniform stable overall field emission patterns after a conditioning process. Effective total current densities up to 1 A/cm2 can be extracted.
ACCESSION #
13719726

 

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