Field emission properties of as-grown multiwalled carbon nanotube films

Abstract

Multiwalled carbon nanotubes have been produced by ethylene catalytic chemical vapor deposition and used to fabricate thick and dense freestanding films ("buckypapers") by membrane filtering. Field emission properties of buckypapers have been locally studied by means of high vacuum atomic force microscopy with a standard metallic cantilever used as anode to collect electrons emitted from the sample. Buckypapers showed an interesting linear dependence in the Fowler-Nordheim plots demonstrating their suitability as emitters. By precisely tuning the tip-sample distance in the submicron region we found out that the field enhancement factor is not affected by distance variations up to 2um. Finally, the study of current stability showed that the field emission current with intensity of about 3,3*10-5A remains remarkably stable (within 5% fluctuations) for several hours.

arXiv comment18 pages, 5 figures

References in corpus (3)

• A local field emission study of partially aligned carbon-nanotubes by AFM probe
• Field emission from single multi-wall carbon nanotubes
• Local probing of the field emission stability of vertically aligned multiwalled carbon nanotubes

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• Field emission from self-catalyzed GaAs nanowires
• Transport and field emission properties of buckypapers obtained from aligned carbon nanotubes
• Field emission from two-dimensional GeAs
• Multi-walled carbon nanotube films for the measurement of the alcoholic concentration