Effect of electrolyte age and potential changes on the morphology of TiO2 nanotubes

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dc.contributor.author Sopha, Hanna
dc.contributor.author Hromádko, Luděk
dc.contributor.author Nechvílová, Kateřina
dc.contributor.author Macák, Jan M.
dc.date.accessioned 2016-03-02T12:37:11Z
dc.date.available 2016-03-02T12:37:11Z
dc.date.issued 2015-11-09
dc.identifier.issn 1572-6657
dc.identifier.uri http://hdl.handle.net/10195/61950
dc.description.abstract In the present work we report on the influence of the age of ethylene glycol-based electrolytes on the synthesis of self-organized TiO2 nanotube layers. Electrolytes of different ages, defined by the total duration for anodization, were explored in order to get an insight into how the tube structure changes with the electrolyte age. The results show a strong dependence of the electrolyte age upon the nanotube length and diameter — a phenomenon surprisingly not discussed in existing literature. When fresh electrolytes are employed, nanotube arrays with a high aspect ratio are received, while in older electrolytes (i.e. already used for anodization) the nanotube arrays exhibit low aspect ratios. This is a very important aspect for the reproducible synthesis of the nanotube layers. Moreover, the effect of the potential on the nanotube dimensions was investigated. Linear dependence of the diameter upon the potential was observed. Last, but not least, the influence of a potential change towards the end of the anodization time was studied. By sweeping the potential to 100 V, or to 5 V and keeping this for 1 h after applying a constant potential of 60 V for 4 h, nanotubes underwent interesting morphological changes. In particular, when slow sweeping from 60 V to 5 V was carried out, small nanotubes grew in the gaps between the initial nanotubes. Interestingly, these nanotube layers showed lower adhesion to the underlying substrates. eng
dc.format p. 122-128 eng
dc.language.iso eng
dc.publisher Elsevier cze
dc.relation.ispartof Journal of Electroanalytical Chemistry. 2015, vol. 759, part 2
dc.rights Attribution-NonCommercial-NoDerivatives 4.0 International *
dc.rights open access eng
dc.rights.uri <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0/"><img alt="Licence Creative Commons" style="border-width:0" src="https://i.creativecommons.org/l/by-nc-nd/4.0/88x31.png" /></a><br />Toto dílo podléhá licenci <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0/">Creative Commons Uveďte původ-Neužívejte komerčně-Nezpracovávejte 4.0 Mezinárodní License</a>. *
dc.subject Anodization eng
dc.subject Adhesion eng
dc.subject Electrolyte age eng
dc.subject Nanotubes eng
dc.subject Titanium dioxide eng
dc.title Effect of electrolyte age and potential changes on the morphology of TiO2 nanotubes eng
dc.type Article eng
dc.peerreviewed yes eng
dc.publicationstatus postprint eng
dc.identifier.doi doi:10.1016/j.jelechem.2015.11.002
dc.relation.publisherversion http://www.sciencedirect.com/science/article/pii/S157266571530182X
dc.date.embargo 2016-05-10
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 WOS:000368044100010
dc.identifier.scopus 2-s2.0-84949057771


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