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SpringerOpen, Nanoscale Research Letters, 1(7), 2012

DOI: 10.1186/1556-276x-7-432

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Improved field emission stability from single-walled carbon nanotubes chemically attached to silicon

Journal article published in 2012 by Cameron J. Shearer, Adam Fahy ORCID, Matthew Barr, Paul C. Dastoor, Joseph G. Shapter
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

Here, we demonstrate the simple fabrication of a single-walled carbon nanotube (SWCNT) field emission electrode which shows excellent field emission characteristics and remarkable field emission stability without requiring posttreatment. Chemically functionalized SWCNTs were chemically attached to a silicon substrate. The chemical attachment led to vertical alignment of SWCNTs on the surface. Field emission sweeps and Fowler-Nordheim plots showed that the Si-SWCNT electrodes field emit with a low turn-on electric field of 1.5 V μm −1 and high electric field enhancement factor of 3,965. The Si-SWCNT electrodes were shown to maintain a current density of >740 μA cm −2 for 15 h with negligible change in applied voltage. The results indicate that adhesion strength between the SWCNTs and substrate is a much greater factor in field emission stability than previously reported.