Preliminary results of the feasibility of hydrogen detection by the use of uncoated silicon microcantilever-based sensorsReport as inadecuate




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1 IMS - Laboratoire de l-intégration, du matériau au système 2 ANDRA - Agence Nationale pour la Gestion des Déchets Radioactifs

Abstract : Hydrogen is a key parameter to monitor radioactive disposal facility such as the envisioned French geological repository for nuclear wastes.
The use of microcantilevers as chemical sensors usually involves a sensitive layer whose purpose is to selectively sorb the analyte of interest.
The sorbed substance can then be detected by monitoring either the resonant frequency shift dynamic mode or the quasi-static deflection static mode.
The objective of this paper is to demonstrate the feasibility of eliminating the need for the sensitive layer in the dynamic mode, thereby increasing the long-term reliability.
The microcantilever resonant frequency allows probing the mechanical properties mass density and viscosity of the surrounding fluid and, thus, to determine the concentration of a species in a binary gaseous.
Promising preliminary work has allowed detecting concentration of 200ppm of hydrogen in air with non-optimized geometry of silicon microcantilever with integrated actuation and read-out.






Author: Mohand-Tayeb Boudjiet - Vincent Cuisset - Claude Pellet - Johan Bertrand - Isabelle Dufour -

Source: https://hal.archives-ouvertes.fr/



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