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Sensors 2018, 18(7), 2266; https://doi.org/10.3390/s18072266

Modeling and Analysis of a Novel Ultrasensitive Differential Resonant Graphene Micro-Accelerometer with Wide Measurement Range

School of Instrumentation Science and Opto-electronics Engineering, Beihang University, Beijing 100191, China
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Received: 5 June 2018 / Revised: 7 July 2018 / Accepted: 10 July 2018 / Published: 13 July 2018
(This article belongs to the Special Issue Sensors for MEMS and Microsystems)
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Abstract

A novel, ultrahigh-sensitivity wide-range resonant micro-accelerometer using two differential double-clamped monolayer graphene beams is designed and investigated by steady-state simulation via COMSOL Multiphysics software in this paper. Along with stiffness-enhanced optimized folded support beams, two symmetrical 3-GPa prestressed graphene nano-beams serve as resonant sensitive elements with a size of 10 μm × 1 μm (length × width) to increase the acceleration sensitivity while extending the measurement range. The simulation results show that the accelerometer with cascade-connected graphene and proof-mass assembly exhibits the ultrahigh sensitivity of 21,224 Hz/g and quality factor of 9773 in the range of 0–1000 g. This is remarkably superior to previously reported studies characterized by attaching proof mass to the graphene components directly. The proposed accelerometer shows great potential as an alternative to quartz and silicon-based resonant sensors in high-impact and highly sensitive inertial measurement applications. View Full-Text
Keywords: graphene resonator; accelerometer; simulation analysis; MEMS/NEMS (micro/nanoelectromechanical systems) sensors graphene resonator; accelerometer; simulation analysis; MEMS/NEMS (micro/nanoelectromechanical systems) sensors
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Shi, F.-T.; Fan, S.-C.; Li, C.; Peng, X.-B. Modeling and Analysis of a Novel Ultrasensitive Differential Resonant Graphene Micro-Accelerometer with Wide Measurement Range. Sensors 2018, 18, 2266.

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