Detail publikace

Se-doped Nb2O5-Al2O3 composite-ceramic nanoarrays via the anodizing of Al/Nb bilayer in selenic acid

KAMNEV, K. BENDOVÁ, M. PYTLÍČEK, Z. PRÁŠEK, J. KEJÍK, L. GUELL, F. LLOBET, E. MOZALEV, A.

Originální název

Se-doped Nb2O5-Al2O3 composite-ceramic nanoarrays via the anodizing of Al/Nb bilayer in selenic acid

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

Novel arrays of Nb2O5-based ceramic nanostructures of various sizes (9-210 nm) and morphologies (dots, goblets, rods) aligned on substrates are fabricated via the anodizing of a thin Nb film through the initially formed porous anodic alumina (PAA) film in 1.5 M selenic acid (H2SeO4) - a new aqueous electrolyte generating extraordinarily thinner PAA pores than any other solutions. Accordingly, the nanostructures formed in the selenic acid are 1.3-fold thinner and better self-ordered than their counterparts formed from the same Al/Nb precursor bilayer in a reference oxalic-acid electrolyte. The nanostructures have a dual (core/shell) composition: the inner material (the core) is stoichiometric Nb2O5, whereas the outer layer (the shell) is a few nm-thick substoichiometric NbOx mixed with Al2O3. The composite-ceramic nanoarrays grow doped with selenium species such as selenate (SeO42-) and selenide (Se-2(-)) anions originating from the electrolyte and migrating inward under the high electric field. The incorporated Se species do not contribute to photoluminescence emission nor hinder the Raman signal from the nanoarrays, which makes them highly promising as Nb2O5-based SERS biosensing substrates. The planar PAA-inbuilt Se-doped Nb2O5-Al2O3 nanostructured ceramic film performs like a high-k low-loss low-leakage-current dielectric promising for on-chip integration. More potential applications of the Se-doped ceramic nanoarrays developed here include biomedical antibacterial coatings, advanced superhydrophobic surfaces, gas-sensing, and catalytic layers.

Klíčová slova

Al2O3-Nb2O5 nanocomposite; Anodizing; Selenic acid; Transition metal oxides; Porous anodic alumina; SERS

Autoři

KAMNEV, K.; BENDOVÁ, M.; PYTLÍČEK, Z.; PRÁŠEK, J.; KEJÍK, L.; GUELL, F.; LLOBET, E.; MOZALEV, A.

Vydáno

15. 11. 2023

Nakladatel

Elsevier

Místo

OXFORD

ISSN

0272-8842

Periodikum

Ceramics International

Ročník

49

Číslo

22, Part A

Stát

Spojené království Velké Británie a Severního Irska

Strany od

34712

Strany do

34725

Strany počet

14

URL

https://www.sciencedirect.com/science/article/pii/S0272884223023878

Plný text v Digitální knihovně

http://hdl.handle.net/11012/244316

BibTex

@article{BUT185750,
  author="Kirill {Kamnev} and Mária {Bendová} and Zdeněk {Pytlíček} and Jan {Prášek} and Lukáš {Kejík} and Frank {Guell} and Eduard {Llobet} and Alexander {Mozalev}",
  title="Se-doped Nb2O5-Al2O3 composite-ceramic nanoarrays via the anodizing of Al/Nb bilayer in selenic acid",
  journal="Ceramics International",
  year="2023",
  volume="49",
  number="22, Part A",
  pages="34712--34725",
  doi="10.1016/j.ceramint.2023.08.134",
  issn="0272-8842",
  url="https://www.sciencedirect.com/science/article/pii/S0272884223023878"
}