Abstract
A detailed investigation of the influence of quartz tuning forks (QTFs) resonance properties on the performance of quartz-enhanced photoacoustic spectroscopy (QEPAS) exploiting QTFs as acousto-electric transducers is reported. The performance of two commercial QTFs with the same resonance frequency (32.7 KHz) but different geometries and two custom QTFs with lower resonance frequencies (2.9 KHz and 7.2 KHz) were compared and discussed. The results demonstrated that the fundamental resonance frequency as well as the quality factor and the electrical resistance were strongly inter-dependent on the QTF prongs geometry. Even if the resonance frequency was reduced, the quality factor must be kept as high as possible and the electrical resistance as low as possible in order to guarantee high QEPAS performance.
Keywords:
custom tuning fork; photoacoustic spectroscopy; quartz tuning fork; quartz-enhanced photoacoustic spectroscopy.
Grants and funding
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11004086, 61675092, 61275046, 61475066, 61405075, 61601404/National Natural Science Foundation of China
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2016A030313079, 2016A030310098, 2016A030311019, 2014A030313377, 2015A030306046, 2015A030313320/Natural Science Foundation of Guangdong Province
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2019B010138004, 2014B010120002, 2014B010117002, 2015B010125007/Special Funds for Major Science and Technology Projects of Guangdong Province
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CXLJTD-201607/Project of Guangzhou Industry Leading Talents
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2017A010102006, 2016A010101017, 2016B010111003, 201506010046/Planned Science & Technology Project of Guangzhou
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6141A02022124/Joint fund of pre-research for equipment, Ministry of Education of China
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201708W4001/Aeronautical Science Foundation of China
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2018KQNCX009, 2018KQNCX279/Foundation for Distinguished Young Talents in Higher Education of Guangdong
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21619402/Fundamental Research Funds for the Central Universities
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SKLAO-201914/State Key Laboratory of Applied Optics
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ERC MIRTHE award/National Science Foundation
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NeTS Large "ASTRO" award/National Science Foundation
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C-0586/the Welch Foundation