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Indium ion emission from nanotube fibres

Martin Hulman and Martin Tajmar

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The manufacture of a liquid metal ion source based on carbon nanotubes is described. Multi-wall carbon nanotubes were attached to the tip of a tungsten needle forming a fibre which was subsequently coated with a layer of indium. The onset of ion emission was observed at about 850 V, a value much lower than that for a conventional indium needle emitter. However, the nanotube fibres degrade rapidly at higher voltages and eventually disappear from the needle.


PACS

79.70.+q Field emission, ionization, evaporation, and desorption

61.46.Fg Nanotubes

Subjects

Condensed matter: electrical, magnetic and optical

Nanoscale science and low-D systems

Dates

Issue 49 (12 December 2007)

Received 27 September 2007, in final form 18 October 2007

Published 8 November 2007



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