Flexible strain sensors based on electrostatically actuated graphene flakes

Somayeh Fardindoost, Akbar Alipour, Saeed Mohammadi, Sayim Gokyar, Reza Sarvari, Azam Iraji Zad, Hilmi Volkan Demir

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

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.

Original languageEnglish
Article number075016
JournalJournal of Micromechanics and Microengineering
Volume25
Issue number7
DOIs
StatePublished - 1 Jul 2015
Externally publishedYes

Keywords

  • flexible sensor
  • graphene electromechanical resonator
  • strain sensing

Fingerprint

Dive into the research topics of 'Flexible strain sensors based on electrostatically actuated graphene flakes'. Together they form a unique fingerprint.

Cite this