Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 227, Issue -, Pages 539-546Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2015.12.096
Keywords
Quartz tuning fork; Resonance frequency; Quality factor; Electrical conductance; Quartz Enhanced Photoacoustic; Spectroscopy; Gas sensing
Funding
- Italian research projects [PONO2 00675, PONO2 00576, PONO3]
- National Natural Science Foundation of China [61575113, 8261275213]
- Robert Welch Foundation [C-0586]
- NSF ERC MIRTHE award
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We report a detailed experimental and theoretical analysis of the influence of quartz tuning fork (QTF) dimensions on the main physical parameters controlling the QTF performance, namely, the quality factor Q, the resonance frequency, the fork stiffness, the spring constant, and the electrical resistance. Two different gold contact patterns were also compared. As a general trend, the QTF performance in terms of Q and electrical conductance values improves at increasing both the crystal thickness T and prong thickness w, while decreasing the prongs length L-p. However, since the QTF resonance frequency f(o) is proportional to 7142, a trade-off should be found in order to keep f(o) <40 kHz, i.e., well below the typical values of non-radiative relaxation rate of a targeted gas absorption lines. (C) 2015 Elsevier B.V. All rights reserved.
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