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Open Access Nano Express

Field emission from non-uniform carbon nanotube arrays

Fernando F Dall'Agnol* and Daniel den Engelsen

Author Affiliations

Center for Information Technology Renato Archer CTI, Rod., D. Pedro I km 143.6, Amarais, Campinas, Sao Paulo 13069-901, Brazil

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Nanoscale Research Letters 2013, 8:319  doi:10.1186/1556-276X-8-319

Published: 10 July 2013

Abstract

Regular arrays of carbon nanotubes (CNTs) are frequently used in studies on field emission. However, non-uniformities are always present like dispersions in height, radius, and position. In this report, we describe the effect of these non-uniformities in the overall emission current by simulation. We show that non-uniform arrays can be modeled as a perfect array multiplied by a factor that is a function of the CNTs spacing.

Keywords:
Non-uniform array; Carbon nanotube array; CNT array; Field emitter array; Field emitter morphology; Field emission simulation