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dc.contributor.authorCOLEMAN, JONATHANen
dc.contributor.authorO'NEILL, ARLENEen
dc.contributor.authorMAY, PETERen
dc.contributor.authorKHAN, UMARen
dc.date.accessioned2011-11-15T13:01:05Z
dc.date.available2011-11-15T13:01:05Z
dc.date.issued2012en
dc.date.submitted2012en
dc.identifier.citationUmar Khan, Arlene O'Neill, Harshit Porwal, Peter May, Khalid Nawaz, Jonathan N. Coleman, Size selection of dispersed, exfoliated graphene flakes by controlled centrifugation, Carbon, 50, 2, 2012, 470-475en
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/60694
dc.descriptionPUBLISHEDen
dc.description.abstractLiquid exfoliation of graphene generally results in flakes with lateral size of one micron or less on average, too small for many applications. In this paper we describe a method to separate an existing dispersion with mean flake length of ~1 ?m into fractions, each with different mean flake size. The initial dispersion is centrifuged at a high centrifugation rate, separating small flakes in the supernatant from large flakes in the sediment. Redispersion of the sediment, followed by successive centrifugation, separation and redispersion cycles can be used to separate the flakes by size so long as the centrifugation rate is decreased with each cycle. This procedure results in a range of dispersions with mean flake length varying from 1 ?m for the highest final centrifugation rate to 3.5 ?m for the sample whose final centrifugation rate was 500 rpm.en
dc.description.sponsorshipWe acknowledge financial support from Science Foundation Ireland through the Principle Investigator scheme (Grant number 07/IN.7/I1772). AO?N thanks IRCSET for financial support.en
dc.format.extent470-475en
dc.language.isoenen
dc.relation.ispartofseriesCarbonen
dc.relation.ispartofseries50en
dc.relation.ispartofseries2en
dc.rightsYen
dc.subjectAtomic, molecular and chemical physicsen
dc.subjectGrapheneen
dc.titleSize selection of dispersed, exfoliated graphene flakes by controlled centrifugationen
dc.typeJournal Articleen
dc.contributor.sponsorScience Foundation Ireland (SFI)en
dc.contributor.sponsorIrish Research Council for Science and Engineering Technology (IRCSET)en
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/colemajen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/ukhanen
dc.identifier.rssinternalid75035en
dc.contributor.sponsorGrantNumber07/IN.7/I1772en
dc.subject.TCDThemeNanoscience & Materialsen
dc.identifier.rssurihttp://dx.doi.org/10.1016/j.carbon.2011.09.001en


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