Print Email Facebook Twitter Fabrication of copper nanowires via electrodeposition in anodic aluminum oxide templates formed by combined hard anodizing and electrochemical barrier layer thinning Title Fabrication of copper nanowires via electrodeposition in anodic aluminum oxide templates formed by combined hard anodizing and electrochemical barrier layer thinning Author Stepniowski, W.J. (TU Delft (OLD) MSE-6; Military University of Technology) Moneta, Marcin (Military University of Technology) Karczewski, Krzysztof (Military University of Technology) Michalska-Domanska, Marta (Military University of Technology) Czujko, Tomasz (Military University of Technology) Mol, J.M.C. (TU Delft (OLD) MSE-6) Buijnsters, J.G. (TU Delft Micro and Nano Engineering) Date 2018 Abstract Anodic aluminum oxide was formed by employing mild and hard anodizing in sulfuric acid followed by mild anodizing in oxalic acid without oxide removal in-between at 40 and 45 V. Such multi-step anodizing, combining hard anodizing in sulfuric acid with mild anodizing in oxalic acid allowed to form a highly-ordered nanoporous template with a barrier layer at the pore bottoms thin enough for further processing. Four different conditions of electrochemical barrier layer thinning, with varied voltage steps and their time durations, were investigated. Optimized conditions allowed to provide conductivity at the pore bottoms and made the nanoporous oxide templates suitable for electrodeposition. It was found that the most effective barrier layer thinning approach employs voltage steps Un + 1 = 0.75·Un with each step (n) being 10 s long. To check applicability of the formed templates, copper electrodeposition from sulfate-borate bath was done. Copper nanowires with average length of about 14–16 μm and diameter of about 35–40 nm were obtained by using through-hole AAO templates. Subject Anodic aluminum oxideAnodizingCopper nanowiresElectrochemical barrier layer thinningElectrodepositionHard anodizingSelf-organization To reference this document use: http://resolver.tudelft.nl/uuid:d5cb7abf-aa09-42a8-9ef5-41e68448c0ee DOI https://doi.org/10.1016/j.jelechem.2017.12.052 Embargo date 2018-06-21 ISSN 1572-6657 Source Journal of Electroanalytical Chemistry, 809, 59-66 Bibliographical note Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2018 W.J. Stepniowski, Marcin Moneta, Krzysztof Karczewski, Marta Michalska-Domanska, Tomasz Czujko, J.M.C. Mol, J.G. Buijnsters Files PDF 1_s2.0_S157266571730927X_main.pdf 1.59 MB Close viewer /islandora/object/uuid:d5cb7abf-aa09-42a8-9ef5-41e68448c0ee/datastream/OBJ/view