High-Density Short-Height Directly Grown CNT Patterned Emitter on Glass

抄録

Vertically aligned, high-density (4× 10⁹ /cm²) carbon nanotubes (CNTs) with an average short height of 1.5 μm were grown directly on a Cr electrode patterned on a glass substrate at a substrate temperature below 550 °C by water-assisted chemical vapor deposition (CVD). Threshold field of the emission of the patterned grown CNT could be tuned with the pattern shape, and it was 1.8 V/μm at 1 μA/cm² for the emitter with a hole spacing parameter of S = 20 μm. The stability of field emission of the patterned CNT emitter on glass was confirmed with continuously working more than 24 hours at a pulse current density of 70 μA/cm² with the duty ratio of 7.5 %. [DOI: 10.1380/ejssnt.2010.336]