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Formation of quasi-spherical Au48-198 clusters in anodic titania nanotubes grown on Ti-Au alloys

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dc.abstract.enThe effect of alloying sputter-deposited Ti with 2 at.% of Au on the growth of anodic nanotubes was studied in monoethylene glycol electrolyte containing 1.0 mol dm−3 of water and 0.1 mol dm−3 of ammonium fluoride. The classic shape of nanotubes modified with quasi-spherical clusters of Au48-198 was obtained on Ti-Au (2 at.%). The results were compared to the formation of a barrier-type anodic film which suggested that gold located at the alloy/anodic film interface is enriched as a consequence of the preferential oxidation of titanium during the prior anodizing period and transported to the cell boundary region of the nanotubular film in the form of quasi-spherical clusters of Au48-198. A consequence of the inclusion of Au48-198 in the structure of the nanotubes was a reduction in the rate of nanotubular film growth due to the generation of oxygen catalysed on the clusters. A further increase in gold content up to 8 at.% in the alloy resulted in the formation of sponge-like or nanoporous anodic layers, with the structure depending on electrolyte composition.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorCastaño, J.G.
dc.contributor.authorEcheverría, F.
dc.contributor.authorAoki, Y.
dc.contributor.authorHabazaki, H.
dc.contributor.authorSepúlveda, M.
dc.contributor.authorKowalski, Damian
dc.date.accessioned2024-01-25T01:14:56Z
dc.date.available2024-01-25T01:14:56Z
dc.date.copyright2020-10-01
dc.date.issued2020
dc.description.accesstimeAT_PUBLICATION
dc.description.financePublikacja bezkosztowa
dc.description.versionFINAL_PUBLISHED
dc.description.volume120
dc.identifier.doi10.1016/J.ELECOM.2020.106847
dc.identifier.issn1388-2481
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/107387
dc.identifier.weblinkhttp://www.sciencedirect.com/science/article/pii/S1388248120301983
dc.languageeng
dc.pbn.affiliationchemical sciences
dc.relation.ispartofElectrochemistry Communications
dc.relation.pages106847
dc.rightsCC-BY-NC-ND
dc.sciencecloudnosend
dc.subject.enAnodizing
dc.subject.enTiO2 nanotubes
dc.subject.enTi-Au alloy
dc.subject.enGold clusters
dc.titleFormation of quasi-spherical Au48-198 clusters in anodic titania nanotubes grown on Ti-Au alloys
dc.typeJournalArticle
dspace.entity.typePublication