Search: id:"swepub:oai:research.chalmers.se:ce6dad04-7d4f-4ad9-91ab-8302be00a46f" >
Atmospheric doping ...
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Panchal, V.National Physical Laboratory (NPL)
(author)
Atmospheric doping effects in epitaxial graphene: correlation of local and global electrical studies
- Article/chapterEnglish2016
Publisher, publication year, extent ...
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2016-02-01
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IOP Publishing,2016
Numbers
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LIBRIS-ID:oai:research.chalmers.se:ce6dad04-7d4f-4ad9-91ab-8302be00a46f
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https://research.chalmers.se/publication/236773URI
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https://doi.org/10.1088/2053-1583/3/1/015006DOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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We directly correlate the local (20 nm scale) and global electronic properties of a device containing mono-, bi- and tri-layer epitaxial graphene (EG) domains on 6H-SiC (0001) by simultaneously performing local surface potential measurements using Kelvin probe force microscopy and global transport measurements. Using well-controlled environmental conditions we investigate the doping effects of N-2, O-2, water vapour and NO2 at concentrations representative of the ambient air. We show that presence of O-2, water vapour and NO2 leads to p-doping of all EG domains. However, the thicker layers of EG are significantly less affected. Furthermore, we demonstrate that the general consensus of O-2 and water vapour present in ambient air providing majority of the p-doping to graphene is a common misconception. We experimentally show that even the combined effect of O-2, water vapour, and NO2 at concentrations higher than typically present in the atmosphere does not fully replicate p-doping from ambient air. Thus, for EG gas sensors it is essential to consider naturally occurring environmental effects and properly separate them from those coming from targeted species.
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Added entries (persons, corporate bodies, meetings, titles ...)
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Giusca, C. E.National Physical Laboratory (NPL)
(author)
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Lartsev, Arseniy,1987Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)arseniy
(author)
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Martin, N. A.National Physical Laboratory (NPL)
(author)
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Cassidy, N.University of Surrey,National Physical Laboratory (NPL)
(author)
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Myers-Ward, R. L.Naval Research Laboratory
(author)
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Gaskill, D. K.Naval Research Laboratory
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Kazakova, O.National Physical Laboratory (NPL)
(author)
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National Physical Laboratory (NPL)Chalmers tekniska högskola
(creator_code:org_t)
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In:2D Materials: IOP Publishing3:12053-1583
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