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Field emission from non-uniform carbon nanotube arrays
Fernando F Dall'agnol1, Daniel den Engelsen
1Center for Information Technology Renato Archer CTI, Rod,, D, Pedro I km 143,6, Amarais, Campinas, Sao Paulo 13069-901, Brazil. fernando.dallagnol@cti.gov.br.
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.
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