1. Flexible strain sensors based on electrostatically actuated graphene flakes
- Author
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Somayeh Fardindoost, Azam Iraji zad, Saeed Mohammadi, Akbar Alipour, Sayim Gokyar, Hilmi Volkan Demir, Reza Sarvari, and Demir, Hilmi Volkan
- Subjects
Materials science ,Non - planar surfaces ,Nanotechnology ,Bending ,Curvature ,Resonance ,Electrical actuation ,Natural frequencies ,law.invention ,Planar ,Quality (physics) ,law ,Graphene electromechanical resonator ,Electromechanical resonators ,Mechanical resonance ,Resonance frequencies ,Electrical and Electronic Engineering ,Composite material ,Strain (chemistry) ,Graphene ,Mechanical Engineering ,Electronic, Optical and Magnetic Materials ,Mechanics of Materials ,Electromechanical devices ,Flexible sensor ,Graphene flake ,Strain sensing ,Electrostatic actuators ,Physical dimensions ,Mechanical resonance frequency - Abstract
In 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.
- Published
- 2015