Journal
NANOTECHNOLOGY
Volume 20, Issue 18, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/20/18/185604
Keywords
-
Funding
- Research Center for Biomolecular Nanotechnology at GIST
- Ministry of Education, Science and Technology [2007-02939]
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Growth of densely packed vertically aligned carbon nanotubes (VA-CNTs) using laser-induced chemical vapor deposition with visible laser (lambda = 532 nm) irradiation at room temperature is reported. Using a multiple-catalyst layer (Fe/Al/Cr) on quartz as the substrate and an acetylene-hydrogen mixture as the precursor gas, VA-CNT pillars with 60 mu m height and 4 mu m diameter were grown at a high rate of around 1 mu m s(-1) with good reproducibility. It is demonstrated that the fabrication of uniform pillar arrays of VA-CNTs can be achieved with a single irradiation for each pillar using LCVD with no annealing or preprocessing of the substrate. Here, laser fast heating is considered the primary mechanism facilitating the growth of VA-CNT pillars. Field emission characteristics of an array of VA-CNT pillars were then examined to investigate their potential application in vacuum electronic devices.
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