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The dielectric constant of a bilayer graphene interface

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Abstract

The interlayer relative dielectric constant, εr, of 2-dimensional (2D) materials in general and graphitic materials in particular is one of their most important physical properties, especially for electronic applications. In this work, we study the electromechanical actuation of nano-scale graphitic contacts. We find that beside the adhesive forces there are capacitive forces that scale parabolically with the potential drop across the sheared interface. We use this phenomena to measure the intrinsic dielectric constant of the bilayer graphene interface i.e. εr = 6 ± 2, which is in perfect agreement with recent theoretical predictions for multi-layer graphene structures. Our method can be generally used to extract the dielectric properties of 2D materials systems and interfaces and our results pave the way for utilizing graphitic and other 2D materials in electromechanical based applications.

Graphical abstract: The dielectric constant of a bilayer graphene interface

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Publication details

The article was received on 14 Nov 2018, accepted on 07 Mar 2019 and first published on 07 Mar 2019


Article type: Communication
DOI: 10.1039/C8NA00350E
Citation: Nanoscale Adv., 2019, Advance Article
  • Open access: Creative Commons BY-NC license
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    The dielectric constant of a bilayer graphene interface

    R. Bessler, U. Duerig and E. Koren, Nanoscale Adv., 2019, Advance Article , DOI: 10.1039/C8NA00350E

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