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dc.contributor.authorMaiti, R.
dc.contributor.authorMidya, A.
dc.contributor.authorNarayana, Chandrabhas
dc.contributor.authorRay, S. K.
dc.date.accessioned2017-02-16T11:32:48Z-
dc.date.available2017-02-16T11:32:48Z-
dc.date.issued2014
dc.identifier.citationMaiti, R; Midya, A; Narayana, C; Ray, SK, Tunable optical properties of graphene oxide by tailoring the oxygen functionalities using infrared irradiation. Nanotechnology 2014, 25 (49), 495704 http://dx.doi.org/10.1088/0957-4484/25/49/495704en_US
dc.identifier.citationNanotechnologyen_US
dc.identifier.citation25en_US
dc.identifier.citation49en_US
dc.identifier.issn0957-4484
dc.identifier.urihttp://hdl.handle.net/10572/2316-
dc.descriptionRestricted Accessen_US
dc.description.abstractThe modification of individual oxygen functional groups and the resultant optical properties of a graphene oxide suspension were investigated using a controlled photothermal reduction by infrared irradiation. The evolution of the structural and optical characteristics of GO suspensions was obtained from Raman spectra, x-ray photoelectron spectroscopy, optical absorption, and steady state and time-resolved photoluminescence spectroscopy. The results suggest the gradual restoration of sp(2) clusters within the sp(3) matrix with an increase of the reduction time and power density. The yellow-red emission (similar to 610 nm) originated from the defect-assisted localized states in GO due to epoxy/hydroxyl (C-O/-OH) functional groups and that of the blue emission (similar to 500 nm) was ascribed to the carbonyl (C=O)-assisted localized electronic states. With an increase in the reduction time and IR power density, the intensity of the yellow-red emission was found to decrease, with the blue emission being prominent. These experimental findings open up a new dimension for controlling the optical absorption and emission properties of graphene oxide by tailoring the oxygen functional groups, which may lead to the potential application of graphene-based optoelectronic devices.en_US
dc.description.uri1361-6528en_US
dc.description.urihttp://dx.doi.org/10.1088/0957-4484/25/49/495704en_US
dc.languageEnglishen
dc.language.isoEnglishen_US
dc.publisherIoP Publishing Ltden_US
dc.rights@IoP Publishing Ltd, 2014en_US
dc.subjectNanoscience & Nanotechnologyen_US
dc.subjectMaterials Scienceen_US
dc.subjectApplied Physicsen_US
dc.subjectGraphene Oxideen_US
dc.subjectDisorder-Induced Localized Stateen_US
dc.subjectTunable Emissionen_US
dc.subjectDeoxygenationen_US
dc.subjectGraphite Oxideen_US
dc.subjectReductionen_US
dc.subjectFilmsen_US
dc.subjectPhotoluminescenceen_US
dc.subjectConductivityen_US
dc.subjectTransparenten_US
dc.subjectDispersionsen_US
dc.subjectNanosheetsen_US
dc.subjectSheetsen_US
dc.subjectBlueen_US
dc.titleTunable optical properties of graphene oxide by tailoring the oxygen functionalities using infrared irradiationen_US
dc.typeArticleen_US
Appears in Collections:Research Articles (Chandrabhas N.)

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