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dc.contributor.authorHornett, Samuel M.
dc.contributor.authorHeath, M.
dc.contributor.authorHorsell, D.W.
dc.contributor.authorHendry, Euan
dc.date.accessioned2014-09-11T14:19:51Z
dc.date.issued2014
dc.description.abstractRecently, there has been a great deal of interest in the effect of atmospheric gases on the properties of graphene. We investigate the electrical and optical response of graphene-based field effect transistors that have been exposed to high purity oxygen gas using a combination of ultrafast two-pulse correlation (to give high temporal resolution) and low-frequency transport measurements (to monitor the photoinduced changes in the Fermi level). By measuring the Fermi level shifts, we are only sensitive to the oxygen atoms that interact directly with the surface. We compare our results to predictions of the empirical friction model for molecular desorption. We show the time scale of the relaxation associated with oxygen desorption to be ∼100 fs, suggesting the desorption proceeds through hot electron generation in the graphene rather than heating of the lattice through hot phonon generation.en_GB
dc.description.sponsorshipEPSRC (Engineering and Physical Sciences Research Council)en_GB
dc.identifier.citationVol. 90 (8), article 081401(R)en_GB
dc.identifier.doi10.1103/PhysRevB.90.081401
dc.identifier.grantnumberEP/K041215/1en_GB
dc.identifier.grantnumberEP/G036101/1en_GB
dc.identifier.urihttp://hdl.handle.net/10871/15518
dc.language.isoenen_GB
dc.publisherAmerican Physical Societyen_GB
dc.relation.urlhttp://dx.doi.org/10.1103/PhysRevB.90.081401en_GB
dc.titleOptically induced oxygen desorption from graphene measured using femtosecond two-pulse correlationen_GB
dc.typeArticleen_GB
dc.date.available2014-09-11T14:19:51Z
dc.identifier.issn1098-0121
dc.descriptionCopyright © 2014 American Physical Societyen_GB
dc.identifier.eissn1550-235X
dc.identifier.journalPhysical Review B - Condensed Matter and Materials Physicsen_GB


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