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dc.contributor.authorFerreira, Mauro
dc.contributor.authorBoland, John
dc.date.accessioned2019-06-05T13:53:22Z
dc.date.available2019-06-05T13:53:22Z
dc.date.issued2016
dc.date.submitted2016en
dc.identifier.citationJ. A. Fairfield, C. G. Rocha, C. O'Callaghan, M. S. Ferreira and J. J. Boland, Co-percolation to tune conductive behaviour in dynamical metallic nanowire networks, Nanoscale, 8, 43, 2016, 18516 - 18523en
dc.identifier.otherY
dc.identifier.urihttp://hdl.handle.net/2262/87257
dc.descriptionPUBLISHEDen
dc.description.abstractNanowire networks act as self‐healing smart materials, whose sheet resistance can be tuned via an externally applied voltage stimulus. This memristive response occurs due to modification of junction resistances to form a connectivity path across the lowest barrier junctions in the network. While most network studies have been performed on expensive noble metal nanowires like silver, networks of inexpensive nickel nanowires with a nickel oxide coating can also demonstrate resistive switching, a common feature of metal oxides with filamentary conduction. However, networks made from solely nickel nanowires have high operation voltages which prohibit large‐scale material applications. Here we show, using both experiment and simulation, that a heterogeneous network of nickel and silver nanowires allows optimization of the activation voltage, as well as tuning of the conduction behavior to be either resistive switching, memristive, or a combination of both. Small percentages of silver nanowires, below the percolation threshold, induce these changes in electrical behavior, even for low area coverage and hence very transparent films. Silver nanowires act as current concentrators, amplifying conductivity locally as shown in our computational dynamical activation framework for networks of junctions. These results demonstrate that a heterogeneous nanowire network can act as a cost‐effective adaptive material with minimal use of noble metal nanowires, without losing memristive behaviour that is essential for smart sensing and neuromorphic applications.en
dc.format.extent18516en
dc.format.extent18523en
dc.language.isoenen
dc.relation.ispartofseriesNanoscale;
dc.relation.ispartofseries8;
dc.relation.ispartofseries43;
dc.rightsYen
dc.subjectNanowire networksen
dc.titleCo-percolation to tune conductive behaviour in dynamical metallic nanowire networksen
dc.typeJournal Articleen
dc.contributor.sponsorEuropean Research Councilen
dc.contributor.sponsorScience Foundation Irelanden
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/jboland
dc.identifier.peoplefinderurlhttp://people.tcd.ie/ferreirm
dc.identifier.rssinternalid133097
dc.identifier.doihttp://dx.doi.org/10.1039/C6NR06276H
dc.rights.ecaccessrightsopenAccess
dc.contributor.sponsorGrantNumber321160en
dc.contributor.sponsorGrantNumber12/RC/2278en
dc.subject.TCDThemeNanoscience & Materialsen
dc.subject.TCDTagNANOSTRUCTURESen
dc.subject.TCDTagNanotechnologyen
dc.subject.TCDTagPhysicsen
dc.status.accessibleNen


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