Beat frequency quartz-enhanced photoacoustic spectroscopy for fast and calibration-free continuous trace-gas monitoring

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dc.citation.articleNumber15331en_US
dc.citation.journalTitleNature Communicationsen_US
dc.citation.volumeNumber8en_US
dc.contributor.authorWu, Hongpengen_US
dc.contributor.authorDong, Leien_US
dc.contributor.authorZheng, Huadanen_US
dc.contributor.authorYu, Yajunen_US
dc.contributor.authorMa, Weiguangen_US
dc.contributor.authorZhang, Leien_US
dc.contributor.authorYin, Wangbaoen_US
dc.contributor.authorXiao, Liantuanen_US
dc.contributor.authorJia, Suotangen_US
dc.contributor.authorTittel, Frank K.en_US
dc.date.accessioned2017-06-06T19:07:23Zen_US
dc.date.available2017-06-06T19:07:23Zen_US
dc.date.issued2017en_US
dc.description.abstractQuartz-enhanced photoacoustic spectroscopy (QEPAS) is a sensitive gas detection technique which requires frequent calibration and has a long response time. Here we report beat frequency (BF) QEPAS that can be used for ultra-sensitive calibration-free trace-gas detection and fast spectral scan applications. The resonance frequency and Q-factor of the quartz tuning fork (QTF) as well as the trace-gas concentration can be obtained simultaneously by detecting the beat frequency signal generated when the transient response signal of the QTF is demodulated at its non-resonance frequency. Hence, BF-QEPAS avoids a calibration process and permits continuous monitoring of a targeted trace gas. Three semiconductor lasers were selected as the excitation source to verify the performance of the BF-QEPAS technique. The BF-QEPAS method is capable of measuring lower trace-gas concentration levels with shorter averaging times as compared to conventional PAS and QEPAS techniques and determines the electrical QTF parameters precisely.en_US
dc.identifier.citationWu, Hongpeng, Dong, Lei, Zheng, Huadan, et al.. "Beat frequency quartz-enhanced photoacoustic spectroscopy for fast and calibration-free continuous trace-gas monitoring." <i>Nature Communications,</i> 8, (2017) Springer Nature: https://doi.org/10.1038/ncomms15331.en_US
dc.identifier.doihttps://doi.org/10.1038/ncomms15331en_US
dc.identifier.urihttps://hdl.handle.net/1911/94812en_US
dc.language.isoengen_US
dc.publisherSpringer Natureen_US
dc.rightsThis work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the articleﾒs Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visitﾠhttp://creativecommons.org/licenses/by/4.0/en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.titleBeat frequency quartz-enhanced photoacoustic spectroscopy for fast and calibration-free continuous trace-gas monitoringen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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