Quartz Enhanced Photoacoustic Spectroscopy Based on a Custom Quartz Tuning Fork.



Duquesnoy, Maxime ORCID: 0000-0003-3178-9799, Aoust, Guillaume, Melkonian, Jean-Michel ORCID: 0000-0002-3447-8446, Lévy, Raphaël ORCID: 0000-0002-4400-9993, Raybaut, Myriam ORCID: 0000-0002-8428-4148 and Godard, Antoine ORCID: 0000-0002-0284-5213
(2019) Quartz Enhanced Photoacoustic Spectroscopy Based on a Custom Quartz Tuning Fork. Sensors (Basel, Switzerland), 19 (6).

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Abstract

We have designed and fabricated a custom quartz tuning fork (QTF) with a reduced fundamental frequency; a larger gap between the prongs; and the best quality factor in air at atmospheric conditions ever reported, to our knowledge. Acoustic microresonators have been added to the QTF in order to enhance the sensor sensitivity. We demonstrate a normalized noise equivalent absorption (NNEA) of 3.7 × 10-9 W.cm-1.Hz-1/2 for CO₂ detection at atmospheric pressure. The influence of the inner diameter and length of the microresonators has been studied, as well as the penetration depth between the QTF's prongs. We investigated the acoustic isolation of our system and measured the Allan deviation of the sensor.

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 28 Nov 2019 15:17
Last Modified: 16 Mar 2020 09:18
DOI: 10.3390/s19061362
Open Access URL: https://www.mdpi.com/1424-8220/19/6/1362
URI: http://livrepository.liverpool.ac.uk/id/eprint/3063870