Improved Tuning Fork for Terahertz Quartz-Enhanced Photoacoustic Spectroscopy
dc.citation.articleNumber | 439 | en_US |
dc.citation.issueNumber | 4 | en_US |
dc.citation.journalTitle | Sensors | en_US |
dc.citation.volumeNumber | 16 | en_US |
dc.contributor.author | Sampaolo, Angelo | en_US |
dc.contributor.author | Patimisco, Pietro | en_US |
dc.contributor.author | Giglio, Marilena | en_US |
dc.contributor.author | Vitiello, Miriam S. | en_US |
dc.contributor.author | Beere, Harvey E. | en_US |
dc.contributor.author | Ritchie, David A. | en_US |
dc.contributor.author | Scamarcio, Gaetano | en_US |
dc.contributor.author | Tittel, Frank K. | en_US |
dc.contributor.author | Spagnolo, Vincenzo | en_US |
dc.date.accessioned | 2016-06-27T15:39:57Z | en_US |
dc.date.available | 2016-06-27T15:39:57Z | en_US |
dc.date.issued | 2016 | en_US |
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. | en_US |
dc.identifier.citation | Sampaolo, 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. | en_US |
dc.identifier.doi | http://dx.doi.org/10.3390/s16040439 | en_US |
dc.identifier.uri | https://hdl.handle.net/1911/90582 | en_US |
dc.language.iso | eng | en_US |
dc.publisher | MDPI AG | en_US |
dc.rights | This 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.uri | https://creativecommons.org/licenses/by/4.0/ | en_US |
dc.subject.keyword | quartz enhanced photoacoustic spectroscopy | en_US |
dc.subject.keyword | quartz tuning fork | en_US |
dc.subject.keyword | gas sensing | en_US |
dc.subject.keyword | THz spectroscopy | en_US |
dc.subject.keyword | quantum cascade laser | en_US |
dc.title | Improved Tuning Fork for Terahertz Quartz-Enhanced Photoacoustic Spectroscopy | en_US |
dc.type | Journal article | en_US |
dc.type.dcmi | Text | en_US |
dc.type.publication | publisher version | en_US |
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