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

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dc.contributor.authorBolger, Ciara T.
dc.contributor.authorFois, Giovanni
dc.contributor.authorPetkov, Nikolay
dc.contributor.authorSassiat, Nicolas
dc.contributor.authorBurke, Micheal
dc.contributor.authorQuinn, Aidan J.
dc.contributor.authorCorss, Graham L. W.
dc.contributor.authorHolmes, Justin D.
dc.contributor.funderIrish Research Council for Science, Engineering and Technologyen
dc.contributor.funderHigher Education Authorityen
dc.contributor.funderScience Foundation Irelanden
dc.date.accessioned2018-09-07T13:58:49Z
dc.date.available2018-09-07T13:58:49Z
dc.date.issued2012-04-05
dc.date.updated2018-08-06T14:25:53Z
dc.description.abstractWe 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.sponsorshipHigher 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.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationCiara, 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:10.1088/0957-4484/23/17/175602en
dc.identifier.doi10.1088/0957-4484/23/17/175602
dc.identifier.endpage175602-10en
dc.identifier.issn0957-4484
dc.identifier.issn1361-6528
dc.identifier.journaltitleNanotechnologyen
dc.identifier.startpage175602-1en
dc.identifier.urihttps://hdl.handle.net/10468/6738
dc.identifier.volume23en
dc.language.isoenen
dc.publisherIOP Publishingen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Centre for Science Engineering and Technology (CSET)/08/CE/I1432/IE/CSET CRANN: 2nd Term funding/en
dc.relation.urihttp://stacks.iop.org/0957-4484/23/i=17/a=175602
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 http://stacks.iop.org/0957-4484/23/i=17/a=175602en
dc.subjectAAOen
dc.subjectMechanical constrainten
dc.subjectAnodisationen
dc.subjectStressen
dc.subjectPoresen
dc.subjectPlanaren
dc.subjectOrderen
dc.subjectAnodic oxidationen
dc.subjectInterfaces (materials)en
dc.subjectOptical microscopyen
dc.subjectSilicon compoundsen
dc.subjectSilicon oxidesen
dc.subjectThree dimensional computer graphicsen
dc.subjectVisualizationen
dc.titleMechanical constraint and release generates long, ordered horizontal pores in anodic alumina templatesen
dc.typeArticle (peer-reviewed)en
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