The experimental results of field-emission characteristics of selectively grown randomly oriented multiwalled carbon nanotubes (CNTs) are presented. The CNTs are synthesized onto plain silicon (n-type 100) substrates having an iron (Fe) catalyst layer using chemical vapor deposition. The field-emission measurement results indicate that the randomly oriented CNTs have significant field-emission capabilities, and the pattern size has an impact on the effective emission area. Effects of pattern size on the turn-on field of the samples are investigated.
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Tsai et al. (2012) studied this question.
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