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On the Differing Sensitivity to Chemical Gating of Single and Double Layer Epitaxial Graphene Explored Using Scanning Kelvin Probe Microscopy
National Physical Laboratory, Teddington, UK.
Linköping University, Department of Physics, Chemistry and Biology, Applied Sensor Science. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Semiconductor Materials. Linköping University, The Institute of Technology.
Linköping University, Department of Physics, Chemistry and Biology, Thin Film Physics. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-2837-3656
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2013 (English)In: ACS Nano, ISSN 1936-0851, E-ISSN 1936-086X, Vol. 7, no 5, 4647-4656 p.Article in journal (Refereed) Published
Abstract [en]

Using environmental scanning Kelvin probe microscopy we show that the position of the Fermi level of single layer graphene is more sensitive to chemical gating than that of double layer graphene. We calculate that the difference in sensitivity to chemical gating is not entirely due to the difference in band structure of 1 and 2 layer graphene. The findings are important for gas sensing where the sensitivity of the electronic properties to gas adsorption are monitored and suggest that single layer graphene could make a more sensitive gas sensor than double layer graphene. We propose that the difference in surface potential between adsorbate-free single and double layer graphene, measured using scanning kelvin probe microscopy, can be used as a non-invasive method of estimating substrate-induced doping in epitaxial graphene.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2013. Vol. 7, no 5, 4647-4656 p.
Keyword [en]
Epitaxial graphene, environmental gating, Scanning Kelvin Probe Microscopy (SKPM), gas sensor
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:liu:diva-92579DOI: 10.1021/nn3052633ISI: 000319856300107OAI: oai:DiVA.org:liu-92579DiVA: diva2:621053
Note

Ruth Pearce, address from march 2012:

NPL Management Ltd, Registered office: Serco House | 16 Bartley Wood Business Park | Hook, Hampshire | UK | RG27 9UY

Available from: 2013-05-13 Created: 2013-05-13 Last updated: 2017-12-06Bibliographically approved

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Pearce, RuthEriksson, JensIakimov, TihomirHultman, LarsLloyd Spetz, AnitaYakimova, Rositza

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Pearce, RuthEriksson, JensIakimov, TihomirHultman, LarsLloyd Spetz, AnitaYakimova, Rositza
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