XPS characterization of metal-oxide nanocolumn arrays via anodizing Al/Nb/Mo metal layers

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F24%3APU150173" target="_blank" >RIV/00216305:26220/24:PU150173 - isvavai.cz</a>

Result on the web

<a href="https://www.confer.cz/nanocon/2023/4751-xps-characterization-of-metal-oxide-nanocolumn-arrays-via-anodizing-al-nb-mo-metal-layers" target="_blank" >https://www.confer.cz/nanocon/2023/4751-xps-characterization-of-metal-oxide-nanocolumn-arrays-via-anodizing-al-nb-mo-metal-layers</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.37904/nanocon.2023.4751" target="_blank" >10.37904/nanocon.2023.4751</a>

Result language

angličtina

Original language name

XPS characterization of metal-oxide nanocolumn arrays via anodizing Al/Nb/Mo metal layers

Original language description

Molybdenum oxides exhibit numerous electronic properties thanks to the ability of Mo to possess various oxidation states and coordinations. Molybdenum oxides are thus attractive for applications in energy storage, conversion, electrochromic, gas sensing, or superconducting devices. The nanostructuring of molybdenum oxides, controlled through the preparation conditions, is advantageous for enhancing the material's properties. The so-called porous-anodic-alumina (PAA)-assisted anodizing, based on the anodic oxidation of a metal layer through a PAA overlayer, may also be a way to grow molybdenum-oxide nanocolumn arrays if their stability in water-containing electrolytes can be secured. To take on the challenge, we envisioned mixing MoOx with the oxide of a different metal (Nb), by placing a thin interlayer of Nb between the Al and Mo in the precursor thin-film stack. The arrays were prepared from the magnetron-sputtered Al/Nb/Mo trilayers by anodizing at 46 V, then re-anodizing to 180 V, followed by selective dissolution of the PAA overlayer. Detailed XPS characterization confirmed that various Mo species were present in the column material, with a total amount of Mo reaching 16 at.% (Mo+Nb = 100%). The fitting of the narrow-scan Nb 3d and Mo 3d spectra showed that Mo6+, Mo5+, and Mo4+, in various ratios, were present at the column surface material, whereas Nb2O5 was almost entirely stoichiometric. Further investigation is underway to understand the formation-structure-morphology relationship and explore the functional properties of the novel nanoarrays.

Czech name

—

Czech description

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Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

21001 - Nano-materials (production and properties)

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

NANOCON Conference Proceedings

ISBN

978-80-88365-15-0

ISSN

—

e-ISSN

—

Number of pages

6

Pages from-to

1-6

Publisher name

TANGER LTD

Place of publication

neuveden

Event location

Brno, Czech Republic

Event date

Oct 18, 2023

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

001234125400001