High aspect ratio TiO2 nanotube layers obtained in a very short anodization time

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dc.contributor.authorAlijani, Mahnazcs
dc.contributor.authorSopha, Hanna Ingridcs
dc.contributor.authorNg, Siow Wooncs
dc.contributor.authorMacák, Jancs
dc.coverage.issue1cs
dc.coverage.volume376cs
dc.date.accessioned2022-10-26T14:53:52Z
dc.date.available2022-10-26T14:53:52Z
dc.date.issued2021-04-20cs
dc.description.abstractOver the past years, the growth of high aspect ratio (HAR) anodic TiO2 nanotubes in a very short time (minute scale) has remained challenging. In the present report, TiO2 nanotube (TNT) layers with HAR approximate to 450 were obtained during only 15 min of optimized anodization. The key feature is the use of NH4 F/H2O/ethylene glycol (EG) electrolytes with the addition of lactic acid (LA) that prevents the dielectric breakdown and enables anodization at higher potentials compared to the classical NH4F/H2O/EG electrolyte without LA. The thickness and average diameter of the obtained TNT layers for 15 minutes? anodization at 160 V were approximately 80 mu m and 170 nm, respectively. Furthermore, we show for the first time that high temperature anodizing, previously introduced as a driving force for the growth of HAR nanotubes in a short time, can be avoided by an accurate optimization of the anodization conditions at room temperature. The results clearly show that electrolytes containing LA can serve as a promising candidate for the ergonomic and economic production of HAR TNT layers on Ti substrates in very short anodization times, i.e. with the addition of LA, the anodization time can be significantly reduced from several hours or several days to 15-30 min. (C) 2021 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.en
dc.formattextcs
dc.format.extent1-9cs
dc.format.mimetypeapplication/pdfcs
dc.identifier.citationElectrochimica Acta. 2021, vol. 376, issue 1, p. 1-9.en
dc.identifier.doi10.1016/j.electacta.2021.138080cs
dc.identifier.issn0013-4686cs
dc.identifier.other171421cs
dc.identifier.urihttp://hdl.handle.net/11012/200987
dc.language.isoencs
dc.publisherElseviercs
dc.relation.ispartofElectrochimica Actacs
dc.relation.urihttps://www.sciencedirect.com/science/article/pii/S0013468621003704cs
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalcs
dc.rights.accessopenAccesscs
dc.rights.sherpahttp://www.sherpa.ac.uk/romeo/issn/0013-4686/cs
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/cs
dc.subjectAnodizationen
dc.subjectTiO2 nanotubesen
dc.subjectLactic aciden
dc.subjectAgingen
dc.subjectBreakdownen
dc.titleHigh aspect ratio TiO2 nanotube layers obtained in a very short anodization timeen
dc.type.driverarticleen
dc.type.statusPeer-revieweden
dc.type.versionpublishedVersionen
sync.item.dbidVAV-171421en
sync.item.dbtypeVAVen
sync.item.insts2022.10.26 16:53:52en
sync.item.modts2022.10.26 16:14:47en
thesis.grantorVysoké učení technické v Brně. Středoevropský technologický institut VUT. Pokročilé nízkodimenzionální nanomateriálycs
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