Comparative Analysis of the Effect of Polystyrene Coating on the Field Emission Characteristic of Tungsten and Carbon Fiber Emitters

Comparative Analysis of the Effect of Polystyrene Coating on the Field Emission Characteristic of Tungsten and Carbon Fiber Emitters

Článek WoS

Achieving high initial emission currents at relatively low operating voltages is essential for field electron emission sources utilized in equipment reliant on focused electron beams. Coating these emitters with a dielectric layer has the potential to enlarge their effective emission region, thereby increasing the initial emission current value while simultaneously reducing the operating voltage. This study compares and contrasts the effects of a dielectric polystyrene coating on field electron emission characteristics, drawing on two investigations of polystyrene-coated emitters. The study provides a brief analysis of the field electron emission characteristics obtained from carbon fiber and tungsten emitters, both prepared using electrochemical etching and subsequently coated with polystyrene. Both studies are thoroughly reviewed and contextualized, emphasizing the advantageous attributes of this emitter type. The focus of the study lies in the current-voltage characteristic, Murphy-Good analysis plot, and field electron emission images obtained from both emitters, with particular attention to how the coating influences emissivity. The investigation into the emission characteristics of coated tungsten indicates a significant improvement over coated carbon fiber emitters, with performance enhanced several times.

Achieving high initial emission currents at relatively low operating voltages is essential for field electron emission sources utilized in equipment reliant on focused electron beams. Coating these emitters with a dielectric layer has the potential to enlarge their effective emission region, thereby increasing the initial emission current value while simultaneously reducing the operating voltage. This study compares and contrasts the effects of a dielectric polystyrene coating on field electron emission characteristics, drawing on two investigations of polystyrene-coated emitters. The study provides a brief analysis of the field electron emission characteristics obtained from carbon fiber and tungsten emitters, both prepared using electrochemical etching and subsequently coated with polystyrene. Both studies are thoroughly reviewed and contextualized, emphasizing the advantageous attributes of this emitter type. The focus of the study lies in the current-voltage characteristic, Murphy-Good analysis plot, and field electron emission images obtained from both emitters, with particular attention to how the coating influences emissivity. The investigation into the emission characteristics of coated tungsten indicates a significant improvement over coated carbon fiber emitters, with performance enhanced several times.

Carbon fiber emitter, Dielectric polystyrene coating, Field electron emission, Murphy-good plot, Tungsten emitter

Carbon fiber emitter, Dielectric polystyrene coating, Field electron emission, Murphy-good plot, Tungsten emitter

MOUSA, M.; TULBURE, I.; SHATNAWI, M.; FAWAEER, S.; KNÁPEK, A.; SEDLÁKOVÁ, V.; AL-AKHRAS, M.; ALABTH, M.; ALLAHAM, M.; ALSOUD, A.; DARADKEH, S.; RONOH, K.; AL-QAISI, W.; SOBOLA, D.

2026

01.08.2025

Jordan journal of physics

18

3

Jordánské hášimovské království

349

363

15

https://dx.doi.org/10.47011%2F18.3.8