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dc.contributor.authorCOLEMAN, JONATHANen
dc.contributor.authorFERREIRA, MAUROen
dc.date.accessioned2009-03-18T16:32:18Z
dc.date.available2009-03-18T16:32:18Z
dc.date.issued2008en
dc.date.submitted2008en
dc.identifier.citationPhilip E Lyons, Sukanta De, Fiona Bligh, Valeria Nicolosi, Luiz Filipe C Pereira Mauro S Ferreira and Jonathan N Coleman, The relationship between network morphology and conductivity in nanotube films, Journal of Applied Physics, 104, 2008, 044302en
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/28326en
dc.descriptionPUBLISHEDen
dc.description.abstractWe have characterized both the direct current conductivity and morphology of a wide range of films made from bundled nanotubes, produced by a selection of commercial suppliers. The conductivity increases with increasing nanotube graphitization but decreases with increasing film porosity P and mean bundle diameter D. Computational studies show that the network conductivity is expected to scale linearly with the number density of interbundle junctions. A simple expression is derived to relate the junction number density to the porosity and mean bundle diameter. Plotting the experimental network conductivities versus the junction number density calculated from porosity and bundle diameter shows an approximate linear relationship. Such a linear relationship implies that the conductivity scales quadratically with the nanotube volume fraction, reminiscent of percolation theory. More importantly it shows the conductivity to scale with D?3. Well-defined scaling with diameter and porosity allows the calculation of a specific conductivity expected for films with porosity of 50% and mean bundle diameter of 2 nm. This predicted specific conductivity scales well with the level of nanotube graphitization, reaching values as high as 1.5?107 S/m for well graphitized HiPCO single walled nanotubes.en
dc.description.sponsorshipWe acknowledge Science Foundation Ireland and the Centre for Research on Adaptive Nanostructures and Nanodevices CRANN for financial support. We gratefully acknowledge Professor Werner Blau for continuing access to equipment.en
dc.format.extent044302en
dc.format.mimetypeapplication/pdf
dc.language.isoenen
dc.relation.ispartofseriesJournal of Applied Physicsen
dc.relation.ispartofseries104en
dc.rightsYen
dc.subjectPhysicsen
dc.titleThe relationship between network morphology and conductivity in nanotube filmsen
dc.typeJournal Articleen
dc.contributor.sponsorScience Foundation Ireland (SFI)en
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/colemajen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/ferreirmen
dc.identifier.rssinternalid56255en
dc.identifier.doihttp://dx.doi.org/10.1063/1.2968437en
dc.identifier.rssurihttp://dx.doi.org/10.1063/1.2968437en


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