Publication detail

Optimization of Tungsten Anodization for Thin WO₃ Layers for Aplication in Cold Field Emission Cathodes

KOŠELOVÁ, Z. KNÁPEK, A. FOHLEROVÁ, Z.

Original Title

Optimization of Tungsten Anodization for Thin WO₃ Layers for Aplication in Cold Field Emission Cathodes

Type

article in a collection out of WoS and Scopus

Language

English

Original Abstract

This study focuses on optimizing the anodization process for producing high-quality tungsten oxide (WO₃) layers on tungsten substrates to enhance cold field emission (CFE) cathode performance. Tungsten samples were anodized in a 0.3 M H₃PO₄ electrolyte solution, with voltage and duration systematically varied to control oxide layer thickness, roughness, and chemical composition. Advanced surface characterization techniques, including XPS, AFM, and SEM, were used to evaluate the layers. Results indicate that anodization at 7.5–12.5 V for 10 minutes yields WO₃-rich layers with low roughness, suitable for stable dielectric barriers to improve electron tunneling. These findings support the potential of anodized WO₃ layers in high-performance CFE applications.

Keywords

Anodization, tungsten oxide (WO₃), cold field emission (CFE), dielectric layer, surface characterization, XPS, AFM, SEM

Authors

KOŠELOVÁ, Z.; KNÁPEK, A.; FOHLEROVÁ, Z.

Released

5. 11. 2024

Publisher

Comenius University Bratislava

Location

Bratislava

ISBN

978-80-223-5941-2

Book

Proceedings of 14th solid state surfaces and interfaces

Pages from

31

Pages to

34

Pages count

4

BibTex

@inproceedings{BUT193447,
  author="Zuzana {Košelová} and Alexandr {Knápek} and Zdenka {Fohlerová}",
  title="Optimization of Tungsten Anodization for Thin WO₃ Layers for Aplication in Cold Field Emission Cathodes",
  booktitle="Proceedings of 14th solid state surfaces and interfaces",
  year="2024",
  pages="31--34",
  publisher="Comenius University Bratislava",
  address="Bratislava",
  isbn="978-80-223-5941-2"
}