|Author(s)||Gliere Alain1, Barritault Pierre1, Berthelot Audrey1, Constancias Christophe1, Coutard Jean-Guillaume1, Deslosges Brigitte1, Durrafourg Laurent1, Fedeli Jean-Marc1, Garcia Marine1, Lartigue Olivier1, Lhermet Hélène1, Marchant Adrien1, Rouxel Justin1, Skubich Jules1, Teulle Alexandre1, Verdot Thierry1, Nicoletti Sergio1|
|Affiliation(s)||1 : CEA, LETI, Univ. Grenoble Alpes, F-38000 Grenoble, France|
|Source||International Journal Of Thermophysics (0195-928X) (Springer), 2020-01 , Vol. 41 , N. 2 , P. 16 (18p.)|
|WOS© Times Cited||1|
|Keyword(s)||MEMS, Photoacoustic spectroscopy, Silicon integration, Trace gas measurements|
Downsizing and compatibility with MEMS silicon foundries is an attractive path towards a large diffusion of photoacoustic trace gas sensors. As the photoacoustic signal scales inversely with the chamber volume, a trend to miniaturization has been followed by several teams. We review in this article the approach initiated several years ago in our laboratory. Three generations of components, namely a 40 mm3 3D-printed cell, a 3.7 mm3 silicon cell, and a 2.3 mm3 silicon cell with a built-in piezoresistive pressure sensor, have been designed. The models used take into account the viscous and thermal losses, which cannot be neglected for such small-sized resonators. The components have been fabricated either by additive manufacturing or microfabrication and characterized. Based on a compilation of experimental data, a similar sub-ppm limit of detection is demonstrated. All three versions of photoacoustic cells have their own domain of operation as each one has benefits and drawbacks, regarding fabrication, implementation, and ease of use.
Gliere Alain, Barritault Pierre, Berthelot Audrey, Constancias Christophe, Coutard Jean-Guillaume, Deslosges Brigitte, Durrafourg Laurent, Fedeli Jean-Marc, Garcia Marine, Lartigue Olivier, Lhermet Hélène, Marchant Adrien, Rouxel Justin, Skubich Jules, Teulle Alexandre, Verdot Thierry, Nicoletti Sergio (2020). Downsizing and Silicon Integration of Photoacoustic Gas Cells. International Journal Of Thermophysics, 41(2), 16 (18p.). Publisher's official version : https://doi.org/10.1007/s10765-019-2580-7 , Open Access version : https://archimer.ifremer.fr/doc/00600/71210/