Estimation of the area of field emission of a carbon nanotube using modelling in COMSOL Multiphysics

Abstract

In this paper, the computer simulation methods were used to study the effect of the mutual shielding in the multi-point system of a nanoscale field cathode on its current-voltage characteristics and the characteristic parameter of the field emission area. Modeling is carried out in the COMSOL Multiphysics software package. Geometric parameters of the model correspond to the parameters of carbon nanotubes. As a result of the simulation, the dependence on the distance between the emission centers of the shape of the current-voltage characteristic of the central emitter, the effective current density of the entire emission system, and the size of the field emission area were constructed.