Fabrication of carbon nanotube emitters on the graphite rod and their high field emission performance

Carbon nanotube (CNT) emitters with small emission area were fabricated on graphite rods using CNT films. By introducing the edge polishing process, the field emission performance of the CNT emitter was much improved, which showed a very high emission current of 6.34 mA (1.6 A/cm2) under an applied...

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Bibliographic Details
Published in:Applied physics letters 2014-01, Vol.104 (4)
Main Authors: Sun, Yuning, Song, Yenan, Hoon Shin, Dong, Nam Yun, Ki, Jeon, Seok-Gy, Kim, Jung-Il, Saito, Yahachi, Jin Lee, Cheol
Format: Article
Language:English
Subjects:
Applied physics
CARBON NANOTUBES
ELECTRIC CURRENTS
ELECTRIC FIELDS
ELECTRON BEAMS
Emitters
Emitters (electron)
FABRICATION
FIELD EMISSION
GRAPHITE
NANOSCIENCE AND NANOTECHNOLOGY
PHASE STABILITY
POLISHING
RODS
THIN FILMS
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Summary:Carbon nanotube (CNT) emitters with small emission area were fabricated on graphite rods using CNT films. By introducing the edge polishing process, the field emission performance of the CNT emitter was much improved, which showed a very high emission current of 6.34 mA (1.6 A/cm2) under an applied electric field of 5.3 V/μm. It also indicates good long-term emission stability, which reveals no degradation in the emission current for 20 h. The emission patterns demonstrate uniform and well-focused electron beam spots. The enhanced field emission performance is mainly attributed to the suppressed edge emission after the edge polishing process.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4863415