Trace gas sensing based on multi-quartz-enhanced photothermal spectroscopy

Yufei Ma; Yinqiu Hu; Shunda Qiao; Ying He; Frank K. Tittel

doi:10.1016/j.pacs.2020.100206

Trace gas sensing based on multi-quartz-enhanced photothermal spectroscopy

Yufei Ma^*
, Yinqiu Hu
, Shunda Qiao
, Ying He
, Frank K. Tittel

^*Corresponding author for this work

School of Astronautics

Harbin Institute of Technology
Rice University

Research output: Contribution to journal › Article › peer-review

99 Scopus citations

Abstract

A multi-quartz-enhanced photothermal spectroscopy (M-QEPTS) based trace gas detection method is reported for the first time. Different from traditional QEPTS sensor employing a single quartz tuning fork (QTF) as a photothermal detector, two QTFs were used in M-QEPTS to increase the signal amplitude by adding the generated piezoelectric signals. The coating film of the QTFs was removed in order to improve the laser absorption and transmission. Acetylene (C₂H₂) was chosen as the target analyte. Wavelength modulation spectroscopy (WMS) and 2nd harmonic detection were utilized for the concentration detection. Limit of detection (LoD) of 0.97 ppm was achieved with a 1 second integration time for the M-QEPTS sensor, which realized a 1.51 times signal enhancement compared to a traditional QEPTS sensor employing a single QTF. By using an Allan deviation analysis approach, LoD of 0.19 ppm for an optimum integration time of 200 s was obtained.

Original language	English
Article number	100206
Journal	Photoacoustics
Volume	20
DOIs	https://doi.org/10.1016/j.pacs.2020.100206
State	Published - Dec 2020

Keywords

M-QEPTS
photothermal spectroscopy
quartz tuning fork
trace gas sensing

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10.1016/j.pacs.2020.100206

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@article{8b519bfb7a2146e1a59182d11c7c5ca9,

title = "Trace gas sensing based on multi-quartz-enhanced photothermal spectroscopy",

abstract = "A multi-quartz-enhanced photothermal spectroscopy (M-QEPTS) based trace gas detection method is reported for the first time. Different from traditional QEPTS sensor employing a single quartz tuning fork (QTF) as a photothermal detector, two QTFs were used in M-QEPTS to increase the signal amplitude by adding the generated piezoelectric signals. The coating film of the QTFs was removed in order to improve the laser absorption and transmission. Acetylene (C2H2) was chosen as the target analyte. Wavelength modulation spectroscopy (WMS) and 2nd harmonic detection were utilized for the concentration detection. Limit of detection (LoD) of 0.97 ppm was achieved with a 1 second integration time for the M-QEPTS sensor, which realized a 1.51 times signal enhancement compared to a traditional QEPTS sensor employing a single QTF. By using an Allan deviation analysis approach, LoD of 0.19 ppm for an optimum integration time of 200 s was obtained.",

keywords = "M-QEPTS, photothermal spectroscopy, quartz tuning fork, trace gas sensing",

author = "Yufei Ma and Yinqiu Hu and Shunda Qiao and Ying He and Tittel, \{Frank K.\}",

note = "Publisher Copyright: {\textcopyright} 2020 The Authors",

year = "2020",

month = dec,

doi = "10.1016/j.pacs.2020.100206",

language = "英语",

volume = "20",

journal = "Photoacoustics",

issn = "2213-5979",

publisher = "Elsevier GmbH",

}

TY - JOUR

T1 - Trace gas sensing based on multi-quartz-enhanced photothermal spectroscopy

AU - Ma, Yufei

AU - Hu, Yinqiu

AU - Qiao, Shunda

AU - He, Ying

AU - Tittel, Frank K.

PY - 2020/12

Y1 - 2020/12

N2 - A multi-quartz-enhanced photothermal spectroscopy (M-QEPTS) based trace gas detection method is reported for the first time. Different from traditional QEPTS sensor employing a single quartz tuning fork (QTF) as a photothermal detector, two QTFs were used in M-QEPTS to increase the signal amplitude by adding the generated piezoelectric signals. The coating film of the QTFs was removed in order to improve the laser absorption and transmission. Acetylene (C2H2) was chosen as the target analyte. Wavelength modulation spectroscopy (WMS) and 2nd harmonic detection were utilized for the concentration detection. Limit of detection (LoD) of 0.97 ppm was achieved with a 1 second integration time for the M-QEPTS sensor, which realized a 1.51 times signal enhancement compared to a traditional QEPTS sensor employing a single QTF. By using an Allan deviation analysis approach, LoD of 0.19 ppm for an optimum integration time of 200 s was obtained.

AB - A multi-quartz-enhanced photothermal spectroscopy (M-QEPTS) based trace gas detection method is reported for the first time. Different from traditional QEPTS sensor employing a single quartz tuning fork (QTF) as a photothermal detector, two QTFs were used in M-QEPTS to increase the signal amplitude by adding the generated piezoelectric signals. The coating film of the QTFs was removed in order to improve the laser absorption and transmission. Acetylene (C2H2) was chosen as the target analyte. Wavelength modulation spectroscopy (WMS) and 2nd harmonic detection were utilized for the concentration detection. Limit of detection (LoD) of 0.97 ppm was achieved with a 1 second integration time for the M-QEPTS sensor, which realized a 1.51 times signal enhancement compared to a traditional QEPTS sensor employing a single QTF. By using an Allan deviation analysis approach, LoD of 0.19 ppm for an optimum integration time of 200 s was obtained.

KW - M-QEPTS

KW - photothermal spectroscopy

KW - quartz tuning fork

KW - trace gas sensing

UR - https://www.scopus.com/pages/publications/85091262766

U2 - 10.1016/j.pacs.2020.100206

DO - 10.1016/j.pacs.2020.100206

M3 - 文章

AN - SCOPUS:85091262766

SN - 2213-5979

VL - 20

JO - Photoacoustics

JF - Photoacoustics

M1 - 100206

ER -

Trace gas sensing based on multi-quartz-enhanced photothermal spectroscopy

Abstract

Keywords

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