Local electric field at the emitting surface of a carbon nanotube

Kokkorakis, GC; Modinos, A; Xanthakis, JP

dc.contributor.author	Kokkorakis, GC	en
dc.contributor.author	Modinos, A	en
dc.contributor.author	Xanthakis, JP	en
dc.date.accessioned	2014-03-01T01:18:02Z
dc.date.available	2014-03-01T01:18:02Z
dc.date.issued	2002	en
dc.identifier.issn	0021-8979	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14762
dc.subject.classification	Physics, Applied	en
dc.subject.other	Cylindrical arrays	en
dc.subject.other	Electrostatic potentials	en
dc.subject.other	Emitting surface	en
dc.subject.other	Enhancement factor	en
dc.subject.other	Linear combinations	en
dc.subject.other	Local electric field	en
dc.subject.other	Polynomial expression	en
dc.subject.other	Single-wall	en
dc.subject.other	Carbon nanotubes	en
dc.subject.other	Electric fields	en
dc.subject.other	Experiments	en
dc.subject.other	Tubes (components)	en
dc.subject.other	Spheres	en
dc.title	Local electric field at the emitting surface of a carbon nanotube	en
heal.type	journalArticle	en
heal.identifier.primary	10.1063/1.1448403	en
heal.identifier.secondary	http://dx.doi.org/10.1063/1.1448403	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	We present a method for the calculation of the local electric field at the surface of a nanoscopic emitting structure. The method is here applied to carbon nanotubes (NT) where symmetry makes the application of the method easier. The NT is simulated as a cylindrical array of touching spheres, each sphere representing an atom of the tube. The electrostatic potential is written as a linear combination of the potentials produced by each of the spheres. We calculate the local electric field and the corresponding enhancement factor γ for both open and closed nanotubes. For a closed NT we find for γ a simple polynomial expression in terms of the ratio of the height h of the tube to its radius R, which for h/R<40 reduces to a frequently quoted formula of γ. For an open single-wall NT we find that γ is three times greater than that of a single-wall NT of the same h/R. As the thickness of the wall increases this difference diminishes. From these results one may deduce a possible explanation as to why in some experiments a closed NT emits more current than a corresponding open one while in other experiments the opposite holds true. © 2002 American Institute of Physics. © 2002 American Institute of Physics.	en
heal.publisher	AMER INST PHYSICS	en
heal.journalName	Journal of Applied Physics	en
dc.identifier.doi	10.1063/1.1448403	en
dc.identifier.isi	ISI:000174663900097	en
dc.identifier.volume	91	en
dc.identifier.issue	7	en
dc.identifier.spage	4580	en
dc.identifier.epage	4584	en