Carbon nanotubes (CNTs) have recently emerged as a promising class of electron field emitters. They have low threshold electric field for emission and high emission current density, which make them attractive for technological applications. In this article we review recent progress on the understanding of CNT field emitters and discuss issues related to the applications of CNT based cold cathodes in vacuum microelectronic devices. Several different construction principles of field-emission devices with CNTs are summarized. The emission mechanism is introduced and a detailed overview is given of the measured emission properties and related topics of CNT electron sources. We have also described several examples of field emission devices with CNT electron emitters that are currently being investigated in the academic world as well as in industry.
Fonte:
Carbon nanotube electric field emitters and applicationsM I Shakir, M Nadeem, S A Shahid and N M Mohamed
Nanotechnology
Volume 17, Number 6, 28 March 2006
Abstract References
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