Mechanical constraint and release generates long, ordered horizontal pores in anodic alumina templates

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Show simple item record Bolger, Ciara T. Fois, Giovanni Petkov, Nikolay Sassiat, Nicolas Burke, Micheal Quinn, Aidan J. Corss, Graham L. W. Holmes, Justin D. 2018-09-07T13:58:49Z 2018-09-07T13:58:49Z 2012-04-05
dc.identifier.citation Ciara, T. B., Giovanni, F., Nikolay, P., Nicolas, S., Micheál, B., Aidan, J. Q., Graham, L. W. C. and Justin, D. H. (2012) 'Mechanical constraint and release generates long, ordered horizontal pores in anodic alumina templates', Nanotechnology, 23(17), 175602 (10 pp). doi:10.1088/0957-4484/23/17/175602 en
dc.identifier.volume 23 en
dc.identifier.startpage 175602-1 en
dc.identifier.endpage 175602-10 en
dc.identifier.issn 0957-4484
dc.identifier.issn 1361-6528
dc.identifier.doi 10.1088/0957-4484/23/17/175602
dc.description.abstract We describe the formation of long, highly ordered arrays of planar oriented anodic aluminum oxide (AAO) pores during plane parallel anodization of thin aluminum 'finger' microstructures fabricated on thermally oxidized silicon substrates and capped with a silicon oxide layer. The pore morphology was found to be strongly influenced by mechanical constraint imposed by the oxide layers surrounding the Al fingers. Tractions induced by the SiO2 substrate and capping layer led to frustrated volume expansion and restricted oxide flow along the interface, with extrusion of oxide into the primary pore volume, leading to the formation of dendritic pore structures and meandering pore growth. However, partial relief of the constraint by a delaminating interfacial fracture, with its tip closely following the anodization front, led to pore growth that was highly ordered with regular, hexagonally packed arrays of straight horizontal pores up to 3 µm long. Detailed characterization of both straight and dendritic planar pores over a range of formation conditions using advanced microscopy techniques is reported, including volume reconstruction, enabling high quality 3D visualization of pore formation. en
dc.description.sponsorship Higher Education Authority (National Access Program (NAP) under which the substrates were provided by Tyndall National Institute (NAP 115); HEA Program for Research in Third Level Institutions (2007–2011) 35 via the INSPIRE program) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher IOP Publishing en
dc.rights © 2012 IOP Publishing Ltd. This is an author-created, un-copyedited version of an article accepted for publication in Nanotechnology. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at en
dc.subject AAO en
dc.subject Mechanical constraint en
dc.subject Anodisation en
dc.subject Stress en
dc.subject Pores en
dc.subject Planar en
dc.subject Order en
dc.subject Anodic oxidation en
dc.subject Interfaces (materials) en
dc.subject Optical microscopy en
dc.subject Silicon compounds en
dc.subject Silicon oxides en
dc.subject Three dimensional computer graphics en
dc.subject Visualization en
dc.title Mechanical constraint and release generates long, ordered horizontal pores in anodic alumina templates en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Justin D. Holmes, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: en
dc.internal.availability Full text available en 2018-08-06T14:25:53Z
dc.description.version Accepted Version en
dc.internal.rssid 137715669
dc.contributor.funder Irish Research Council for Science, Engineering and Technology en
dc.contributor.funder Higher Education Authority en
dc.contributor.funder Science Foundation Ireland en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Nanotechnology en
dc.internal.copyrightchecked No !!CORA!! en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Centre for Science Engineering and Technology (CSET)/08/CE/I1432/IE/CSET CRANN: 2nd Term funding/ en

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