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Title: Field emission behavior of carbon nanotube field emitters after high temperature thermal annealing

The carbon nanotube (CNT) field emitters have been fabricated by attaching a CNT film on a graphite rod using graphite adhesive material. The CNT field emitters showed much improved field emission properties due to increasing crystallinity and decreasing defects in CNTs after the high temperature thermal annealing at 900 °C in vacuum ambient. The CNT field emitters showed the low turn-on electric field of 1.15 V/μm, the low threshold electric field of 1.62 V/μm, and the high emission current of 5.9 mA which corresponds to a current density of 8.5 A/cm{sup 2}. In addition, the CNT field emitters indicated the enhanced field emission properties due to the multi-stage effect when the length of the graphite rod increases. The CNT field emitter showed good field emission stability after the high temperature thermal annealing. The CNT field emitter revealed a focused electron beam spot without any focusing electrodes and also showed good field emission repeatability.
Authors:
; ; ;  [1] ; ;  [2] ; ;  [3] ;  [4] ;  [1] ;  [5]
  1. School of Electrical Engineering, Korea University, Seoul 136-713 (Korea, Republic of)
  2. Department of Micro/Nano Systems, Korea University, Seoul 136-713 (Korea, Republic of)
  3. Advanced Medical Device Research Center, Korea Electrotechnology Research Institute (KERI), Ansan 127-56 (Korea, Republic of)
  4. Department of Quantum Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8603 (Japan)
  5. (Korea, Republic of)
Publication Date:
OSTI Identifier:
22299867
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Advances; Journal Volume: 4; Journal Issue: 7; Other Information: (c) 2014 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ANNEALING; AUGMENTATION; CARBON NANOTUBES; ELECTRIC FIELDS; FIELD EMISSION; FILMS; GRAPHITE