Intrinsic properties of high-aspect ratio single- and double-wall anodic TiO2 nanotube layers annealed at different temperatures

Show simple item record Motola, Martin Hromádko, Luděk Přikryl, Jan Sopha, Hanna Krbal, Milos Macak, Jan 2020-12-04T08:13:25Z 2020-12-04T08:13:25Z 2020
dc.identifier.issn 0013-4686
dc.description.abstract In this work, we present the influence of thermal annealing on morphological, structural, electrical, optical, and photoelectrochemical properties of double- (DW) and single-wall (SW) TiO2 nanotube (TNT) layers. High-aspect ratio TNT layers with a thickness of ~5 µm and ~20 µm with an average inner diameter of ~250 nm and ~130 nm, respectively, were prepared via electrochemical anodization of Ti foil in two different fluoride containing ethylene glycol-based electrolytes. The inner wall of the native DW TNT layers was quantitatively removed via a mild pre-annealing followed by a selective etching treatment in piranha solution, yielding SW TNT layers. The obtained SW TNT layers annealed at 300 – 500 °C possess enhanced conductivity by 1 – 2 orders compared to their DW counterparts. The photoelectrochemical properties of SW TNT layers are enhanced compared to their DW counterparts in the annealing temperature range 300 – 800 °C. In principle, the SW TNT layers could be potentially favored to the DW TNT layers in electrical and photoelectrochemical applications due to their more superior intrinsic properties. en
dc.language.iso en
dc.publisher Elsevier eng
dc.relation.ispartof Electrochimica Acta. August 2020, vol. 352, 136479 eng
dc.rights open access (CC BY-NC-ND 4.0) eng
dc.rights.uri eng
dc.subject TiO2 nanotubes eng
dc.subject Annealing eng
dc.subject Single-wall eng
dc.subject Conductivity eng
dc.subject Photoelectrochemistry eng
dc.title Intrinsic properties of high-aspect ratio single- and double-wall anodic TiO2 nanotube layers annealed at different temperatures eng
dc.type Article eng
dc.peerreviewed yes eng
dc.publicationstatus This is a postprint of an article published in Electrochimica Acta. The final authenticated version is available online at: or eng
dc.identifier.doi 10.1016/j.electacta.2020.136479
dc.relation.publisherversion eng
dc.project.ID EC/H2020/638857/EU/Towards New Generation of Solid-State Photovoltaic Cell: Harvesting Nanotubular Titania and Hybrid Chromophores/CHROMTISOL eng
dc.identifier.wos 000541156300005
dc.identifier.scopus 2-s2.0-85085268960

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

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