期刊
NANOTECHNOLOGY
卷 19, 期 39, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/19/39/395701
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资金
- INFN (Istituto Nazionale di Fisica Nucleare-Italy)
- GINT (Gruppo INFN per le Nano Tecnologie)
- European Collaborative Project 'S-five'
The electron field emission characteristics of individual multiwalled carbon nanotubes were investigated by a piezoelectric nanomanipulation system operating inside a scanning electron microscopy chamber. The experimental set-up ensures a precise evaluation of the geometric parameters (multiwalled carbon nanotube length and diameter and anode-cathode separation) of the field emission system. For several multiwalled carbon nanotubes, reproducible and quite stable emission current behaviour was obtained, with a dependence on the applied voltage well described by a series resistance modified Fowler-Nordheim model. A turn-on field of similar to 30 V mu m(-1) and a field enhancement factor of around 100 at a cathode-anode distance of the order of 1 mu m were evaluated. Finally, the effect of selective electron beam irradiation on the nanotube field emission capabilities was extensively investigated.
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