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Sensors 2016, 16(6), 758; doi:10.3390/s16060758

Nonlinear-Based MEMS Sensors and Active Switches for Gas Detection

Physical Sciences and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-9600, Saudi Arabia
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Academic Editor: Stefano Mariani
Received: 31 March 2016 / Revised: 13 May 2016 / Accepted: 17 May 2016 / Published: 25 May 2016
(This article belongs to the Special Issue Modeling, Testing and Reliability Issues in MEMS Engineering)
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Abstract

The objective of this paper is to demonstrate the integration of a MOF thin film on electrostatically actuated microstructures to realize a switch triggered by gas and a sensing algorithm based on amplitude tracking. The devices are based on the nonlinear response of micromachined clamped-clamped beams. The microbeams are coated with a metal-organic framework (MOF), namely HKUST-1, to achieve high sensitivity. The softening and hardening nonlinear behaviors of the microbeams are exploited to demonstrate the ideas. For gas sensing, an amplitude-based tracking algorithm is developed to quantify the captured quantity of gas. Then, a MEMS switch triggered by gas using the nonlinear response of the microbeam is demonstrated. Noise analysis is conducted, which shows that the switch has high stability against thermal noise. The proposed switch is promising for delivering binary sensing information, and also can be used directly to activate useful functionalities, such as alarming. View Full-Text
Keywords: microbeam; gas sensor; active switch; microcontroller; nonlinear dynamics; metal-organic framework microbeam; gas sensor; active switch; microcontroller; nonlinear dynamics; metal-organic framework
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Bouchaala, A.; Jaber, N.; Yassine, O.; Shekhah, O.; Chernikova, V.; Eddaoudi, M.; Younis, M.I. Nonlinear-Based MEMS Sensors and Active Switches for Gas Detection. Sensors 2016, 16, 758.

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