Simulation for field emission images of micrometer-long SWCNTs

TL;DR

This paper uses multi-scale simulations to analyze how field emission images of micrometer-long single-walled carbon nanotubes change with different applied electric fields, revealing symmetry breaking and pattern variations.

Contribution

It introduces a multi-scaled algorithm to simulate field emission images of open-ended SWCNTs and studies the effect of electric field strength on emission patterns.

Findings

Emission patterns change with applied field.

Symmetry breaking occurs at lower fields.

Enlargement factor increases with field.

Abstract

The electron distribution of open-ended single-walled carbon nanotubes with chirality indexes (7,0) and (5,5) in the field emission conditions was calculated via a multi-scaled algorithm. The field emission images were produced numerically. It was found that the emission patterns change with the applied macroscopic field. Especially, the symmetry of the emission pattern of the (7,0) carbon nanotube is breaking in the lower field but the breaking is less obvious in the higher field. The enlargement factor increases with the applied macroscopic field.