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dc.contributor.authorZhao, Weijie
dc.contributor.authorTan, Ping Heng
dc.contributor.authorLiu, Jian
dc.contributor.authorFerrari, Andrea
dc.date.accessioned2018-11-30T00:31:35Z
dc.date.available2018-11-30T00:31:35Z
dc.date.issued2011-04-20
dc.identifier.issn0002-7863
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/286121
dc.description.abstractWe use anhydrous ferric chloride (FeCl(3)) to intercalate graphite flakes consisting of 2-4 graphene layers and to dope graphene monolayers. The intercalant, staging, stability, and doping of the resulting intercalation compounds (ICs) are characterized by Raman scattering. The G peak of heavily doped monolayer graphene upshifts to ∼1627 cm(-1). The 2-4 layer ICs have similar upshifts, and a Lorentzian line shape for the 2D band, indicating that each layer behaves as a decoupled heavily doped monolayer. By performing Raman measurements at different excitation energies, we show that, for a given doping level, the 2D peak can be suppressed by Pauli blocking for laser energy below the doping level. Thus, multiwavelength Raman spectroscopy allows a direct measurement of the Fermi level, complementary to that derived by performing measurements at fixed excitation energy significantly higher than the doping level. This allows us to estimate a Fermi level shift of up to ∼0.9 eV. These ICs are thus ideal test-beds for the physical and chemical properties of heavily doped graphenes.
dc.format.mediumPrint-Electronic
dc.languageeng
dc.publisherAmerican Chemical Society (ACS)
dc.titleIntercalation of few-layer graphite flakes with FeCl3: Raman determination of Fermi level, layer by layer decoupling, and stability.
dc.typeArticle
prism.endingPage5946
prism.issueIdentifier15
prism.publicationDate2011
prism.publicationNameJ Am Chem Soc
prism.startingPage5941
prism.volume133
dc.identifier.doi10.17863/CAM.33436
rioxxterms.versionofrecord10.1021/ja110939a
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2011-04
dc.contributor.orcidFerrari, Andrea [0000-0003-0907-9993]
dc.identifier.eissn1520-5126
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/G042357/1)
rioxxterms.freetoread.startdate2012-04-30


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