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ŠIMŮNKOVÁ, H. LEDNICKÝ, T. WHITEHEAD, A. KALINA, L. ŠIMŮNEK, P. HUBÁLEK, J.
Originální název
Tantalum-based nanotube arrays via porous-alumina-assisted electrodeposition from ionic liquid: Formation and electrical characterization
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
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.
Klíčová slova
Electrodeposition, ionic liquid, tantalum oxide, porous anodic alumina, impedance spectroscopy, coulometry
Autoři
ŠIMŮNKOVÁ, H.; LEDNICKÝ, T.; WHITEHEAD, A.; KALINA, L.; ŠIMŮNEK, P.; HUBÁLEK, J.
Vydáno
5. 2. 2021
Nakladatel
Elsevier
ISSN
0169-4332
Periodikum
Applied Surface Science
Ročník
548
Číslo
149264
Stát
Nizozemsko
Strany od
Strany do
149274
Strany počet
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" }