Patimisco, PietroSampaolo, AngeloDong, LeiTittel, Frank K.Spagnolo, Vincenzo2018-07-162018-07-162018Patimisco, Pietro, Sampaolo, Angelo, Dong, Lei, et al.. "Recent advances in quartz enhanced photoacoustic sensing." <i>Applied Physics Reviews,</i> 5, no. 1 (2018) AIP Publishing: https://doi.org/10.1063/1.5013612.https://hdl.handle.net/1911/102425This review aims to discuss the latest advancements in quartz-enhanced photoacoustic spectroscopy (QEPAS) based trace-gas sensing. Starting from the QEPAS basic physical principles, the most used QEPAS configurations will be described. This is followed by a detailed theoretical analysis and experimental study regarding the influence of quartz tuning forks (QTFs) geometry on their optoacoustic transducer performance. Furthermore, an overview of the latest developments in QEPAS trace-gas sensor technology employing custom QTFs will be reported. Results obtained by exploiting novel micro-resonator configurations, capable of increasing the QEPAS signal-to-noise ratio by more than two orders of magnitude and the utilization of QTF overtone flexural modes for QEPAS based sensing will be presented. A comparison of the QEPAS performance of different spectrophone configurations is reported based upon signal-to-noise ratio. Finally, a novel QEPAS approach allowing simultaneous dual-gas detection will be described.engArticle is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.Journal articlehttps://doi.org/10.1063/1.5013612