Intercalation of few-layer graphite flakes with FeCl3: Raman determination of Fermi level, layer by layer decoupling, and stability.
cam.issuedOnline | 2011-03-24 | |
dc.contributor.author | Zhao, Weijie | |
dc.contributor.author | Tan, Ping Heng | |
dc.contributor.author | Liu, Jian | |
dc.contributor.author | Ferrari, Andrea C | |
dc.contributor.orcid | Ferrari, Andrea [0000-0003-0907-9993] | |
dc.date.accessioned | 2018-11-30T00:31:35Z | |
dc.date.available | 2018-11-30T00:31:35Z | |
dc.date.issued | 2011-04-20 | |
dc.description.abstract | We 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.medium | Print-Electronic | |
dc.identifier.doi | 10.17863/CAM.33436 | |
dc.identifier.eissn | 1520-5126 | |
dc.identifier.issn | 0002-7863 | |
dc.identifier.uri | https://www.repository.cam.ac.uk/handle/1810/286121 | |
dc.language | eng | |
dc.language.iso | eng | |
dc.publisher | American Chemical Society (ACS) | |
dc.publisher.url | http://dx.doi.org/10.1021/ja110939a | |
dc.subject | FERRIC-CHLORIDE | |
dc.subject | CHARGE-TRANSFER | |
dc.subject | SINGLE-LAYER | |
dc.subject | GRAPHENE | |
dc.subject | SPECTROSCOPY | |
dc.subject | SCATTERING | |
dc.subject | SPECTRA | |
dc.title | Intercalation of few-layer graphite flakes with FeCl3: Raman determination of Fermi level, layer by layer decoupling, and stability. | |
dc.type | Article | |
prism.endingPage | 5946 | |
prism.issueIdentifier | 15 | |
prism.publicationDate | 2011 | |
prism.publicationName | J Am Chem Soc | |
prism.startingPage | 5941 | |
prism.volume | 133 | |
pubs.funder-project-id | Engineering and Physical Sciences Research Council (EP/G042357/1) | |
rioxxterms.licenseref.startdate | 2011-04 | |
rioxxterms.licenseref.uri | http://www.rioxx.net/licenses/all-rights-reserved | |
rioxxterms.type | Journal Article/Review | |
rioxxterms.version | AM | |
rioxxterms.versionofrecord | 10.1021/ja110939a |
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