Improved Tuning Fork for Terahertz Quartz-Enhanced Photoacoustic Spectroscopy

dc.citation.articleNumber439en_US
dc.citation.issueNumber4en_US
dc.citation.journalTitleSensorsen_US
dc.citation.volumeNumber16en_US
dc.contributor.authorSampaolo, Angeloen_US
dc.contributor.authorPatimisco, Pietroen_US
dc.contributor.authorGiglio, Marilenaen_US
dc.contributor.authorVitiello, Miriam S.en_US
dc.contributor.authorBeere, Harvey E.en_US
dc.contributor.authorRitchie, David A.en_US
dc.contributor.authorScamarcio, Gaetanoen_US
dc.contributor.authorTittel, Frank K.en_US
dc.contributor.authorSpagnolo, Vincenzoen_US
dc.date.accessioned2016-06-27T15:39:57Z
dc.date.available2016-06-27T15:39:57Z
dc.date.issued2016en_US
dc.description.abstractWe report on a quartz-enhanced photoacoustic (QEPAS) sensor for methanol (CH₃OH) detection employing a novel quartz tuning fork (QTF), specifically designed to enhance the QEPAS sensing performance in the terahertz (THz) spectral range. A discussion of the QTF properties in terms of resonance frequency, quality factor and acousto-electric transduction efficiency as a function of prong sizes and spacing between the QTF prongs is presented. The QTF was employed in a QEPAS sensor system using a 3.93 THz quantum cascade laser as the excitation source in resonance with a CH₃OH rotational absorption line located at 131.054 cm(-1). A minimum detection limit of 160 ppb in 30 s integration time, corresponding to a normalized noise equivalent absorption NNEA = 3.75 × 10(-11) cm(-1)W/Hz(½), was achieved, representing a nearly one-order-of-magnitude improvement with respect to previous reports.en_US
dc.identifier.citationSampaolo, Angelo, Patimisco, Pietro, Giglio, Marilena, et al.. "Improved Tuning Fork for Terahertz Quartz-Enhanced Photoacoustic Spectroscopy." <i>Sensors,</i> 16, no. 4 (2016) MDPI AG: http://dx.doi.org/10.3390/s16040439.
dc.identifier.doihttp://dx.doi.org/10.3390/s16040439en_US
dc.identifier.urihttps://hdl.handle.net/1911/90582
dc.language.isoengen_US
dc.publisherMDPI AG
dc.rightsThis article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license.en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/en_US
dc.subject.keywordquartz enhanced photoacoustic spectroscopyen_US
dc.subject.keywordquartz tuning forken_US
dc.subject.keywordgas sensingen_US
dc.subject.keywordTHz spectroscopyen_US
dc.subject.keywordquantum cascade laseren_US
dc.titleImproved Tuning Fork for Terahertz Quartz-Enhanced Photoacoustic Spectroscopyen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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