Electron field emission from multi-walled carbon nanotubes

M. Sveningsson, R. E. Morjan, O. Nerushev, E. E.B. Campbell

Research output: Contribution to journalConference articlepeer-review

49 Scopus citations

Abstract

Films of aligned multi-walled carbon nanotubes (MWNT) are produced by two different methods, thermal chemical vapour deposition (thermal CVD) and plasma chemical vapour deposition (plasma CVD), on silicon substrates. Electron field emission measurements on these films show that the thermal CVD produced films have excellent emission properties, while the plasma CVD films seem to give a lower electron emission with lower threshold and turn-on fields on the initial voltage scan. The electron emission for some of the films is accompanied by light emission from the carbon nanotubes at high emission current densities. The light emission is a result of strong ohmic heating and can be explained in terms of the one dimensional heat equation. This heating effect in the nanotube film is more important for the thermal CVD films than for the plasma films and can be qualitatively explained by considering the nanotube morphology in each case.

Original languageEnglish
Pages (from-to)1165-1168
Number of pages4
JournalCarbon
Volume42
Issue number5-6
DOIs
StatePublished - 2004
EventEuropean Materials Research Society 2003 - Strasbourg, France
Duration: 10 Jun 200313 Jun 2003

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