Publication Details (including relevant citation information):
Archana Pandey, Abhishek Prasad, Jason Moscatello, Benjamin Ulmen and Yoke Khin Yap
Carbon, Volume 48, Number 1, Pages 287–292, 2010
Self-assembled bundling and catalyst removal can enhance the field emission stability and density of vertically-aligned multiwalled carbon nanotubes (VA-MWCNTs). These catalyst-free, opened tip VA-MWCNTs offered better emission stability than the as-grown samples. Both the emission stability and density were further enhanced as the opened-tip MWCNTs self-assembled into arrays of conical bundles. Theoretical simulation suggests that higher emission density was due to the reduced screening effects. The simulated local fields at the tips of the bundles suggest for a two-order of magnitude lower electric field loading on MWCNTs and contribute to prolong emission stability needed for practical applications.
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