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Double layer-coated carbon nanotubes: Field emission and secondary-electron emission properties under presence of intense electric field

Authors
Lee, JungwooPark, JaehongSim, KijoYi, Whikun
Issue Date
Mar-2009
Publisher
A V S AMER INST PHYSICS
Citation
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, v.27, no.2, pp.626 - 630
Indexed
SCIE
SCOPUS
Journal Title
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B
Volume
27
Number
2
Start Page
626
End Page
630
URI
https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/177158
DOI
10.1116/1.3093886
ISSN
1071-1023
Abstract
The authors measured the field emission (FE) and secondary-electron emission (SEE) of carbon nanotubes (CNTs) after coating with wide-band-gap materials, such as MOO and CsI. The FE was increased successively after MgO coating and subsequent CsI coating for both single-walled and multiwalled CNTs. SEE also showed the same increase after monolayer and double-layer coating. The field-enhancement factor, beta, was calculated from the Fowler-Nordheim equation of FE results, and SEE yield, delta, was measured directly from the SEE measurements, for both monolayer- and double-layer-coated nanotubes. Both values showed similar trends that may be described as follows: (1) The trend for the double-layer-coated CNTs was higher than that for the mono layer-coated CNTs. (2) The trend for the single-walled CNTs was higher than that for the multiwalled CNTs.
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