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- Title
Electron field emission from magnetic nanomaterial encapsulated multi-walled carbon nanotubes.
- Authors
Rakhi, R. B.; Lim, X.; Gao, X.; Wang, Y.; Wee, A. T. S.; Sethupathi, K.; Ramaprabhu, S.; Sow, C. H.
- Abstract
The present work describes the field emission characteristics of nanoscale magnetic nanomaterial encapsulated multi-walled carbon nanotubes (MWNTs) fabricated over flexible graphitized carbon cloth. Ni/MWNTs, NiFe/MWNTs and NiFeCo/MWNTs have been synthesized by catalytic chemical vapor decomposition of methane over Mischmetal (Mm)-based AB3 (MmNi3, MmFe1.5Ni1.5 and MmFeCoNi) alloy hydride catalysts. Metal-encapsulated MWNTs exhibited superior field emission performance than pure MWNT-based field emitters over the same substrate. The results indicate that a Ni-filled MWNT field emitter is a promising material for practical field emission application with a lowest turn-on field of 0.6 V/μm and a high emission current density of 0.3 mA/cm2 at 0.9 V/μm.
- Subjects
FIELD emission; ELECTRON emission; CARBON nanotubes; METHANE; MISCHMETAL
- Publication
Applied Physics A: Materials Science & Processing, 2010, Vol 98, Issue 1, p195
- ISSN
0947-8396
- Publication type
Article
- DOI
10.1007/s00339-009-5373-1