Publication detail

Tantalum-based nanotube arrays via porous-alumina-assisted electrodeposition from ionic liquid: Formation and electrical characterization

ŠIMŮNKOVÁ, H. LEDNICKÝ, T. WHITEHEAD, A. KALINA, L. ŠIMŮNEK, P. HUBÁLEK, J.

Original Title

Tantalum-based nanotube arrays via porous-alumina-assisted electrodeposition from ionic liquid: Formation and electrical characterization

Type

journal article in Web of Science

Language

English

Original Abstract

Fabrication of tantalum-based nanotube arrays was accomplished via porous anodic alumina (PAA) assisted electrodeposition (ED). The ED was performed through a PAA template from a conductive bottom face. Mechanically stable, free-standing and spatially-separated TaxOy-nanotubes were electrodeposited potentiostatically at −1.4 V vs. Pt with a high uniformity and population density across the sample surface. The electrolyte employed a room temperature ionic liquid ([BMP]Tf2N) as a solvent. Some impurities in the tantalum pentoxide nanotubes resulted from this selection of solvent. Additionally, some tantalum suboxides with valencies lower than 5 were present. Structural defects, oxygen vacancies and impurities were expected, which might account for the high leakage current of the TaxOy-nanotubes. The nanotubes resistivity was analyzed by the impedance spectroscopy. Based on the magnitude of resistivity and its thermal behavior we could classify the TaxOy material as semiconducting. Development of three-dimensional (3D) tantalum and tantalum oxide nanostructures is of particular interest for potential applications in microelectronic devices with high surface-to-volume ratios, e.g., metal–insulator-metal (MIM) storage capacitors, electrochemical sensors and switching microdevices.

Keywords

Electrodeposition, ionic liquid, tantalum oxide, porous anodic alumina, impedance spectroscopy, coulometry

Authors

ŠIMŮNKOVÁ, H.; LEDNICKÝ, T.; WHITEHEAD, A.; KALINA, L.; ŠIMŮNEK, P.; HUBÁLEK, J.

Released

5. 2. 2021

Publisher

Elsevier

ISBN

0169-4332

Periodical

Applied Surface Science

Year of study

548

Number

149264

State

Kingdom of the Netherlands

Pages from

149264

Pages to

149274

Pages count

10

URL

https://www.sciencedirect.com/science/article/pii/S0169433221003408?via%3Dihub

BibTex

@article{BUT171289,
  author="Helena {Šimůnková} and Tomáš {Lednický} and A.H. {Whitehead} and Lukáš {Kalina} and Petr {Šimůnek} and Jaromír {Hubálek}",
  title="Tantalum-based nanotube arrays via porous-alumina-assisted electrodeposition from ionic liquid: Formation and electrical characterization",
  journal="Applied Surface Science",
  year="2021",
  volume="548",
  number="149264",
  pages="149264--149274",
  doi="10.1016/j.apsusc.2021.149264",
  issn="0169-4332",
  url="https://www.sciencedirect.com/science/article/pii/S0169433221003408?via%3Dihub"
}