Ferromagnetism in Graphene Nanoribbons: Split versus Oxidative Unzipped Ribbons

Simple item page
dc.citation.firstpage1210en_US
dc.citation.issueNumber3en_US
dc.citation.journalTitleNano Lettersen_US
dc.citation.lastpage1217en_US
dc.citation.volumeNumber12en_US
dc.contributor.authorRao, S.S.en_US
dc.contributor.authorJammalamadaka, S. Narayanaen_US
dc.contributor.authorStesmans, A.en_US
dc.contributor.authorMoshchalkov, V.V.en_US
dc.contributor.authorvan Tol, J.en_US
dc.contributor.authorKosynkin, D.V.en_US
dc.contributor.authorHigginbotham, A.en_US
dc.contributor.authorTour, J.M.en_US
dc.contributor.orgSmalley Institute for Nanoscale Science and Technologyen_US
dc.date.accessioned2016-06-08T16:16:52Zen_US
dc.date.available2016-06-08T16:16:52Zen_US
dc.date.issued2012en_US
dc.description.abstractTwo types of graphene nanoribbons: (a) potassium-split graphene nanoribbons (GNRs), and (b) oxidative unzipped and chemically converted graphene nanoribbons (CCGNRs) were investigated for their magnetic properties using the combination of static magnetization and electron spin resonance measurements. The two types of ribbons possess remarkably different magnetic properties. While a low-temperature ferromagnet-like feature is observed in both types of ribbons, such room-temperature feature persists only in potassium-split ribbons. The GNRs show negative exchange bias, but the CCGNRs exhibit a ﾓpositive exchange biasﾔ. Electron spin resonance measurements suggest that the carbon-related defects may be responsible for the observed magnetic behavior in both types of ribbons. Furthermore, information on the proton hyperfine coupling strength has been obtained from hyperfine sublevel correlation experiments performed on the GNRs. Electron spin resonance finds no evidence for the presence of potassium (cluster) related signals, pointing to the intrinsic magnetic nature of the ribbons. Our combined experimental results may indicate the coexistence of ferromagnetic clusters with antiferromagnetic regions leading to disordered magnetic phase. We discuss the possible origin of the observed contrast in the magnetic behaviors of the two types of ribbons studied.en_US
dc.identifier.citationRao, S.S., Jammalamadaka, S. Narayana, Stesmans, A., et al.. "Ferromagnetism in Graphene Nanoribbons: Split versus Oxidative Unzipped Ribbons." <i>Nano Letters,</i> 12, no. 3 (2012) American Chemical Society: 1210-1217. http://dx.doi.org/10.1021/nl203512c.en_US
dc.identifier.doihttp://dx.doi.org/10.1021/nl203512cen_US
dc.identifier.urihttps://hdl.handle.net/1911/90463en_US
dc.language.isoengen_US
dc.publisherAmerican Chemical Societyen_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by the American Chemical Society.en_US
dc.subject.keywordmagnetismen_US
dc.subject.keywordgraphene nanoribbonsen_US
dc.subject.keywordexchange biasen_US
dc.subject.keywordESRen_US
dc.subject.keywordHYSCOREen_US
dc.titleFerromagnetism in Graphene Nanoribbons: Split versus Oxidative Unzipped Ribbonsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
1204.4401.pdf
Size:
812.67 KB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Faculty Publications
Chemistry Publications
Materials Science and NanoEngineering Publications