Local Electron Field Emission Study of Two-dimensional Carbon

TL;DR

This study investigates the electron field emission properties of various two-dimensional carbon materials, developing an analytical model to explain how the field enhancement factor varies with cathode-anode distance, supported by experimental data.

Contribution

It introduces a new analytical model for field enhancement in two-dimensional carbon emission, validated by experimental results and literature data.

Findings

Field enhancement factor increases with cathode-anode distance.

Good agreement between model calculations and experimental data.

Provides insights into field emission characteristics of 2D carbon.

Abstract

A systematic field-emission study has been carried out on different types of two-dimensional carbons in ultrahigh vacuum with the cathode-anode distance ranging from near-contact to about 124 nm. An analytical model has been developed to explain the increase of field enhancement factor with the cathode-anode distance. Good agreement has been achieved between the calculation results and experimental data, including those reported in literature. The work provides useful insights into the characteristics of field emission from two-dimensional carbon.