Field emission from non-uniform carbon nanotube arrays
Center for Information Technology Renato Archer CTI, Rod., D. Pedro I km 143.6, Amarais, Campinas, Sao Paulo 13069-901, Brazil
Nanoscale Research Letters 2013, 8:319 doi:10.1186/1556-276X-8-319Published: 10 July 2013
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.