Field emission from single multi-wall carbon nanotubes

Details Field emission from single multi-wall carbon nanotubes Field emission from single multi-wall carbon nanotubes

2008-03-06

arxiv.org/abs/0803.0810v1

NANOTECHNOLOGY Volume: 19 Issue: 39 Article Number: 395701 Published: OCT 1 2008

Physics

Condensed Matter

Materials Science

16 pages, 5 figures

Scientific paper

10.1088/0957-4484/19/39/395701

Electron field emission characteristics of individual multiwalled carbon nanotubes have been investigated by a piezoelectric nanomanipulation system operating inside a scanning electron microscopy chamber. The experimental setup ensures a high control capability on the geometric parameters of the field emission system (CNT length, diameter and anode-cathode distance). For several multiwalled carbon nanotubes, reproducible and quite stable emission current behaviour has been obtained with a dependence on the applied voltage well described by a series resistance modified Fowler-Nordheim model. A turn-on field of about 30 V/um and a field enhancement factor of around 100 at a cathode-anode distance of the order of 1 um have been evaluated. Finally, the effect of selective electron beam irradiation on the nanotube field emission capabilities has been extensively investigated.

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