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Electromechanical Sensing of Substrate Charge Hidden under Atomic 2D Crystals

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journal contribution
posted on 11.06.2014, 00:00 by Nicholas D. Kay, Benjamin J. Robinson, Vladimir I. Fal’ko, Konstantin S. Novoselov, Oleg V. Kolosov
The functionality of graphene and other two-dimensional materials in electronic devices is highly influenced by the film–substrate charge transfer affecting local carrier density. We demonstrate that charges buried under the few layer graphene on/in the insulating substrate can be detected using electromechanical actuation of the conductive atomically thin layers, allowing measurements of areal density of film–substrate transferred charges under few layer graphene and MoS2 suspended films.