TiO2 ALD coating of amorphous TiO2 nanotube layers: Inhibition of the structural and morphological changes due to water annealing

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dc.contributor.author Ng, Siowwoon
dc.contributor.author Sopha, Hanna
dc.contributor.author Zazpe, Raul
dc.contributor.author Spotz, Zdenek
dc.contributor.author Bijalwan, Vijay
dc.contributor.author Dvorak, Filip
dc.contributor.author Hromádko, Luděk
dc.contributor.author Přikryl, Jan
dc.contributor.author Macák, Jan
dc.date.accessioned 2020-12-04T08:30:34Z
dc.date.available 2020-12-04T08:30:34Z
dc.date.issued 2020
dc.identifier.issn 2296-2646
dc.identifier.uri https://hdl.handle.net/10195/76806
dc.description.abstract The present work presents a strategy to stabilize amorphous anodic self-organized TiO2 nanotube layers against morphological changes and crystallization upon extensive water soaking. The growth of needle-like nanoparticles was observed on the outer and inner walls of amorphous nanotube layers after extensive water soakings, in line with the literature on water annealing. In contrary, when TiO2 nanotube layers uniformly coated by thin TiO2 using atomic layer deposition (ALD) were soaked in water, the growth rates of needle-like nanoparticles were substantially reduced. We investigated the soaking effects of ALD TiO2 coatings with different thicknesses and deposition temperatures. Sufficiently thick TiO2 coatings (≈8.4 nm) deposited at different ALD process temperatures efficiently hamper the reactions between water and F- ions, maintain the amorphous state and preserve the original tubular morphology. This work demonstrates the possibility of having robust amorphous 1D TiO2 nanotube layers that are very stable in water. This is very practical for diverse biomedical applications that are accompanied by extensive contact with an aqueous environment. en
dc.language.iso en
dc.publisher Frontiers Media S.A. eng
dc.relation.ispartof Frontiers in Chemistry. Vol. 7, iss. FEB, 2019, article number 38 eng
dc.rights open access (CC BY 4.0) eng
dc.rights.uri https://creativecommons.org/licenses/by/4.0/ eng
dc.subject TiO2 eng
dc.subject nanotubes eng
dc.subject atomic layer deposition eng
dc.subject coating eng
dc.subject water annealing eng
dc.title TiO2 ALD coating of amorphous TiO2 nanotube layers: Inhibition of the structural and morphological changes due to water annealing eng
dc.type Article eng
dc.peerreviewed yes eng
dc.publicationstatus This is a postprint of an article published in Frontiers in Chemistry. The final authenticated version is available online at: https://doi.org/10.3389/fchem.2019.00038 or https://www.frontiersin.org/articles/10.3389/fchem.2019.00038/full eng
dc.identifier.doi 10.3389/fchem.2019.00038
dc.relation.publisherversion https://www.frontiersin.org/articles/10.3389/fchem.2019.00038/full eng
dc.project.ID EC/H2020/638857/EU/Towards New Generation of Solid-State Photovoltaic Cell: Harvesting Nanotubular Titania and Hybrid Chromophores/CHROMTISOL
dc.identifier.wos 000457450000001
dc.identifier.scopus 2-s2.0-85068512582

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open access (CC BY 4.0) Except where otherwise noted, this item's license is described as open access (CC BY 4.0)

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