Fardindoost, S.Alipour, A.Mohammadi, S.Gökyar, S.Sarvari, R.Iraji Zad, A.Demir, Hilmi Volkan2016-02-082016-02-0820150960-1317http://hdl.handle.net/11693/21569In this paper we present flexible strain sensors made of graphene flakes fabricated, characterized, and analyzed for the electrical actuation and readout of their mechanical vibratory response in strain-sensing applications. For a typical suspended graphene membrane fabricated with an approximate length of 10 μm, a mechanical resonance frequency around 136 MHz with a quality factor (Q) of ∼60 in air under ambient conditions was observed. The applied strain can shift the resonance frequency substantially, which is found to be related to the alteration of physical dimension and the built-in strain in the graphene flake. Strain sensing was performed using both planar and nonplanar surfaces (bending with different radii of curvature) as well as by stretching with different elongations. © 2015 IOP Publishing Ltd.EnglishGraphene electromechanical resonatorElectromechanical devicesElectrostatic actuatorsNatural frequenciesResonanceElectrical actuationElectromechanical resonatorsFlexible sensorMechanical resonance frequencyNon - planar surfacesPhysical dimensionsResonance frequenciesStrain sensingGrapheneArticle10.1088/0960-1317/25/7/075016