RF Ring Oscillator Graphene-Based Strain Sensor

Funding Number

RSG1-20

Funding Sponsor

American University in Cairo

Author's Department

Mechanical Engineering Department

Find in your Library

https://doi.org/10.1109/Transducers50396.2021.9495429

Document Type

Research Article

Publication Title

21st International Conference on Solid-State Sensors, Actuators and Microsystems, TRANSDUCERS 2021

Publication Date

6-20-2021

doi

10.1109/Transducers50396.2021.9495429

Abstract

Graphene-based RF ring oscillator sensor was demonstrated as a high gauge factor (GF) strain sensor. CVD-grown graphene monolayer on a flexible Cu layer was integrated on a five-stage RF ring oscillator platform and utilized to measure elastic strain. The main features of the proposed technique are high sensitivity (i.e., high gauge factor), low power, and high signal-to-noise-ratio due to the digital operation, which leads to noise suppression. Strains in the range of 8× 10-4 to 2.5× 10-2 were measured with the detected change in surface resistance in the order of 1.6-1.8Omega/, and average gauge factor, \GF\approx 64.36. The main advantage of the proposed approach with frequency change detection as compared to the widely investigated graphene on PDMS strain gauges are higher sensitivity due to higher conductivity of the graphene layer, and lower noise due to the overall low resistance of the circuit and better CMOS integration as compared to the conventional resistive change sensing platforms.

First Page

1359

Last Page

1362

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