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Defect Formation In Graphene Nanosheets By Acid Treatment: An X-Ray Absorption Spectroscopy And Density Functional Theory Study
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and condensed matter physics.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Biochemistry and Organic Chemistry.
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2008 (English)In: Journal of Physics D: Applied Physics, ISSN 0022-3727, E-ISSN 1361-6463, Vol. 41, no 6, 062001-4 p.Article in journal (Refereed) Published
Abstract [en]

In-plane defects have been introduced into graphene nanosheets by treatment with hydrochloric acid. Acid treatment induces bond cleavage in the C–C network via electrophilic attack. These resultant vacancy sites will then undergo further reactions with the surrounding ambient to produce C–O and C–H bonds. A σ* resonance at 287 eV in the carbon K-edge x-ray absorption spectra is observed with acid treatment and is assigned to C–O states. Theoretical modelling of a di-vacancy in a graphene bilayer reproduces all essential features of this resonance and in addition predicts a metallic conductivity of states around this vacancy. The possibility of engineering the properties of graphene via the routes explored here is an important step towards establishing strategies for building devices based on this material.

Place, publisher, year, edition, pages
2008. Vol. 41, no 6, 062001-4 p.
National Category
Organic Chemistry Inorganic Chemistry
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URN: urn:nbn:se:uu:diva-105284DOI: 10.1088/0022-3727/41/6/062001ISI: 000254153900001OAI: oai:DiVA.org:uu-105284DiVA: diva2:220986
Available from: 2009-06-03 Created: 2009-06-03 Last updated: 2017-01-25

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Knut, RonnyKaris, OlofSanyal, BiplabEriksson, Olle

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Knut, RonnyKaris, OlofSanyal, BiplabEriksson, Olle
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Molecular and condensed matter physicsDepartment of Biochemistry and Organic ChemistryDepartment of Materials ChemistryMaterials Theory
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Journal of Physics D: Applied Physics
Organic ChemistryInorganic Chemistry

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