Mapping the conductivity of graphene with Electrical Resistance Tomography

Electronic applications of large-area graphene films require rapid and accurate methods to map their electrical properties. Here we present the first electrical resistance tomography (ERT) measurements on large-area graphene samples, obtained with a dedicated measurement setup and reconstruction sof...

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Bibliographic Details
Published inScientific reports Vol. 9; no. 1; pp. 10655 - 9
Main Authors Cultrera, Alessandro, Serazio, Danilo, Zurutuza, Amaia, Centeno, Alba, Txoperena, Oihana, Etayo, David, Cordon, Alvaro, Redo-Sanchez, Albert, Arnedo, Israel, Ortolano, Massimo, Callegaro, Luca
Format Journal Article
LanguageEnglish
Published England Nature Publishing Group 23.07.2019
Nature Publishing Group UK
Subjects
Electrical conductivity
Electrical properties
Graphene
Spectroscopy
Tomography
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Summary:Electronic applications of large-area graphene films require rapid and accurate methods to map their electrical properties. Here we present the first electrical resistance tomography (ERT) measurements on large-area graphene samples, obtained with a dedicated measurement setup and reconstruction software. The outcome of an ERT measurement is a map of the graphene electrical conductivity. The same setup allows to perform van der Pauw (vdP) measurements of the average conductivity. We characterised the electrical conductivity of chemical-vapour deposited graphene samples by performing ERT, vdP and scanning terahertz time-domain spectroscopy (TDS), the last one by means of a commercial instrument. The measurement results are compared and discussed, showing the potential of ERT as an accurate and reliable technique for the electrical characterization of graphene samples.
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ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-019-46713-8