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dc.contributor.authorSampaolo, Angelo
Patimisco, Pietro
Giglio, Marilena
Vitiello, Miriam S.
Beere, Harvey E.
Ritchie, David A.
Scamarcio, Gaetano
Tittel, Frank K.
Spagnolo, Vincenzo
dc.date.accessioned 2016-06-27T15:39:57Z
dc.date.available 2016-06-27T15:39:57Z
dc.date.issued 2016
dc.identifier.citation Sampaolo, Angelo, Patimisco, Pietro, Giglio, Marilena, et al.. "Improved Tuning Fork for Terahertz Quartz-Enhanced Photoacoustic Spectroscopy." Sensors, 16, no. 4 (2016) MDPI AG: http://dx.doi.org/10.3390/s16040439.
dc.identifier.urihttps://hdl.handle.net/1911/90582
dc.description.abstract We 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.
dc.language.iso eng
dc.publisher MDPI AG
dc.rights This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license.
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.title Improved Tuning Fork for Terahertz Quartz-Enhanced Photoacoustic Spectroscopy
dc.type Journal article
dc.citation.journalTitle Sensors
dc.subject.keywordquartz enhanced photoacoustic spectroscopy
quartz tuning fork
gas sensing
THz spectroscopy
quantum cascade laser
dc.citation.volumeNumber 16
dc.citation.issueNumber 4
dc.type.dcmi Text
dc.identifier.doihttp://dx.doi.org/10.3390/s16040439
dc.identifier.pmcid PMC4850953
dc.identifier.pmid 27023552
dc.type.publication publisher version
dc.citation.articleNumber 439


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This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license.
Except where otherwise noted, this item's license is described as This article is an open access article distributed under the terms and conditions of the Creative Commons by Attribution (CC-BY) license.