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Sensors and Materials
is an international peer-reviewed open access journal to provide a forum for researchers working in multidisciplinary fields of sensing technology.
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Sensors and Materials, Volume 30, Number 9(2) (2018)
Copyright(C) MYU K.K. All Rights Reserved.
pp. 2085-2100
S&M1662
https://doi.org/10.18494/SAM.2018.1955
Published: September 28, 2018

Ultrahigh-sensitivity Graphene-based Strain Gauge Sensor: Fabrication on Si/SiO2 and First-principles Simulation [PDF]

Mohammed Gamil, Ahmed M. R. Fath El-Bab, Ahmed Abd El-Moneim, and Koichi Nakamura

(Received April 4, 2018; Accepted July 23, 2018)

Keywords: graphene, chemical vapor deposition, strain gauge, gauge factor, piezoresistive sensors, MEMS devices, first-principles calculation

Monolayer and multilayer graphene films have been grown on a Cu substrate by chemical vapor deposition (CVD) and then transferred onto a SiO2/Si substrate using polymethyl methacrylate (PMMA) to fabricate an ultrasensitive graphene-based strain gauge sensor. The graphene films were patterned using a CO2 laser beam. The sensitivity and temperature dependence of the gauge factor (GF) of the fabricated sensors were examined at different applied strains and operating temperatures up to 0.05% and 75 °C, respectively. The fabricated gauges based on monolayer and multilayer graphene films show stable GFs of 255 and 104 within the applied temperature range, respectively. The patterning technique provides an interesting, low-cost, fast, and high-throughput process to realize scalable microfabrication for highly sensitive strain sensors with good temperature stability based on graphene piezoresistivity. A theoretical simulation of the GF of monolayer graphene has also been carried out on the basis of first-principles calculation. Simulation results follow the measured GFs in our experiment and other references.

Corresponding author: Koichi Nakamura

Cite this article
Mohammed Gamil, Ahmed M. R. Fath El-Bab, Ahmed Abd El-Moneim, and Koichi Nakamura, Ultrahigh-sensitivity Graphene-based Strain Gauge Sensor: Fabrication on Si/SiO2 and First-principles Simulation, Sens. Mater., Vol. 30, No. 9, 2018, p. 2085-2100.



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