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Emission stability enhancement of a tip-type carbon-nanotube-based field emitter via hafnium interlayer deposition and thermal treatment

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4 Author(s)
Kim, Jong-Pil ; R&D Team, Health and Medical Equipment Business Team, Samsung Electronics, Suwon, Gyeonggi-do 443-742, South Korea ; Chang, Han-Beet ; Kim, Bu-Jong ; Park, Jin-Seok

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Carbon nanotubes (CNTs) were deposited on a tip-type tungsten substrate via electrophoretic deposition, in which a hafnium thin film was used as an interlayer. The long-term (up to 24 h) emission stability of the CNT-based field emitter was remarkably enhanced when the hafnium interlayer was coated and thermally treated. This is attributed to the enhanced adhesion between the substrate and the CNTs. An x-ray photoelectron spectroscopy study and nano-scratch measurement provided a convincing evidence of the increase in the adhesive force.

Published in:

Applied Physics Letters  (Volume:100 ,  Issue: 12 )