Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 206, Issue -, Pages 364-370Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2014.09.044
Keywords
Trace gas detection; Quartz enhanced photoacoustic spectroscopy; Quartz tuning fork; Acoustic micro resonator; Spectrophone; Position effects
Funding
- 973 program [2012CB921603]
- National Natural Science Foundation of China [61275213, 61108030, 61127017, 61178009, 61378047, 61205216]
- National Key Technology RD Program [2013BAC14B01]
- Shanxi Natural Science Foundation [2013021004-1, 2012021022-1]
- Shanxi Patent Promotion and Implementation Project
- Shanxi Scholarship Council of China [2013-011, 2013-01]
- Robert Welch Foundation grant [C-0586]
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The impact of acoustic micro-resonator (AmR) positions with respect to quartz tuning fork on signal amplitude, Q-factor and signal-to-noise ratio (SNR) of the quartz enhanced photoacoustic spectroscopy spectrophone was investigated. The replacement of the result plots' abscissas makes the highest signal amplitude and the lowest Q-factor for different AmRs appear at the two absolute positions, respectively. These positions are independent on the AmR geometrical parameters, which facilitates the assembly of the spectrophone. The noncoincidence between the positions of the two extreme values results in a flat peak of the SNR curve, which is different from previously reported results. The spectrophone designs for three different applications are discussed in detail. (C) 2014 Elsevier B.V. All rights reserved.
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