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Field-Induced Electron Emission from Nanoporous Carbons
Joint Authors
Arkhipov, Alexander
Davydov, Sergey
Gabdullin, Pavel
Gnuchev, Nikolay
Kravchik, Alexandr
Krel, Svyatoslav
Source
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-12-07
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Influence of fabrication technology on field electron emission properties of nanoporous carbon (NPC) was investigated.
Samples of NPC derived from different carbides via chlorination at different temperatures demonstrated similar low-field emission ability with threshold electric field 2-3 V/ μ m.
This property correlated with presence of nanopores with characteristic size 0.5–1.2 nm, determining high values of specific surface area (>800 m2/g) of the material.
In most cases, current characteristics of emission were approximately linear in Fowler-Nordheim coordinates (excluding a low-current part near the emission threshold), but the plots’ slope angles were in notable disagreement with the known material morphology and electronic properties, unexplainable within the frames of the classical emission theory.
We suggest that the actual emission mechanism for NPC involves generation of hot electrons at internal boundaries and that emission centers may be associated with relatively large (20–100 nm) onion-like particles observed in many microscopic images.
Such particles can serve two functions: to provide additional “internal” enhancement of the electric field and to inhibit relaxation of hot charge carriers due to the “phonon bottleneck” effect.
American Psychological Association (APA)
Arkhipov, Alexander& Davydov, Sergey& Gabdullin, Pavel& Gnuchev, Nikolay& Kravchik, Alexandr& Krel, Svyatoslav. 2014. Field-Induced Electron Emission from Nanoporous Carbons. Journal of Nanomaterials،Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-1041260
Modern Language Association (MLA)
Arkhipov, Alexander…[et al.]. Field-Induced Electron Emission from Nanoporous Carbons. Journal of Nanomaterials No. 2014 (2014), pp.1-9.
https://search.emarefa.net/detail/BIM-1041260
American Medical Association (AMA)
Arkhipov, Alexander& Davydov, Sergey& Gabdullin, Pavel& Gnuchev, Nikolay& Kravchik, Alexandr& Krel, Svyatoslav. Field-Induced Electron Emission from Nanoporous Carbons. Journal of Nanomaterials. 2014. Vol. 2014, no. 2014, pp.1-9.
https://search.emarefa.net/detail/BIM-1041260
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1041260