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

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dc.contributor.authorKamnev, Kirillcs
dc.contributor.authorBendová, Máriacs
dc.contributor.authorPytlíček, Zdeněkcs
dc.contributor.authorPrášek, Jancs
dc.contributor.authorKejík, Lukášcs
dc.contributor.authorGuell, Frankcs
dc.contributor.authorLlobet, Eduardcs
dc.contributor.authorMozalev, Alexandercs
dc.coverage.issue22, Part Acs
dc.coverage.volume49cs
dc.date.issued2023-11-15cs
dc.description.abstractNovel 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.en
dc.formattextcs
dc.format.extent34712-34725cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationCeramics International. 2023, vol. 49, issue 22, Part A, p. 34712-34725.en
dc.identifier.doi10.1016/j.ceramint.2023.08.134cs
dc.identifier.issn0272-8842cs
dc.identifier.orcid0000-0001-8999-5363cs
dc.identifier.orcid0000-0002-9116-7740cs
dc.identifier.orcid0000-0003-1228-5712cs
dc.identifier.orcid0000-0001-6275-0171cs
dc.identifier.orcid0000-0002-9505-5359cs
dc.identifier.other185750cs
dc.identifier.researcheridAAC-6166-2019cs
dc.identifier.researcheridE-2387-2012cs
dc.identifier.researcheridAAX-7836-2020cs
dc.identifier.researcheridH-3928-2012cs
dc.identifier.scopus57193340784cs
dc.identifier.scopus56845730100cs
dc.identifier.scopus7003947942cs
dc.identifier.scopus6601972151cs
dc.identifier.urihttp://hdl.handle.net/11012/244316
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofCeramics Internationalcs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0272884223023878cs
dc.rightsCreative Commons Attribution 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/0272-8842/cs
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/cs
dc.subjectAl2O3-Nb2O5 nanocompositeen
dc.subjectAnodizingen
dc.subjectSelenic aciden
dc.subjectTransition metal oxidesen
dc.subjectPorous anodic aluminaen
dc.subjectSERSen
dc.titleSe-doped Nb2O5-Al2O3 composite-ceramic nanoarrays via the anodizing of Al/Nb bilayer in selenic aciden
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-185750en
sync.item.dbtypeVAVen
sync.item.insts2025.02.03 15:41:15en
sync.item.modts2025.01.17 15:30:14en
thesis.grantorVysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií. Ústav mikroelektronikycs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Chytré nanonástrojecs
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Sdílená laboratoř RP1cs
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