Physical Interpretation of Field Emission Behavior in Patterned Samples via Simulation-Validated Models

Abstract

Vertically aligned carbon nanotube (VACNT) arrays have been developed to enhance field emission (FE) performance. In this study, the CNT tips were arranged in a 17 x 17 square array, and various patterns were selectively introduced by removing the tips to mitigate the screening effect and improve the emission characteristics. FE experiments were conducted for each pattern and the corresponding simulations were performed and compared. To quantitatively evaluate the performance of each pattern, eight analytical models were introduced. Among these, the minimum E field (Min E) model predicted excellent agreement with the top three patterns in the experimental results, indicating potentially predictive tools for future emitter design.