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All-Electronic THz-Wave Gas Sensing via Absorption Spectroscopy.

Record Type:	Electronic resources : Monograph/item
Title/Author:	All-Electronic THz-Wave Gas Sensing via Absorption Spectroscopy./
Author:	Rice, Timothy Emre.
Description:	1 online resource (115 pages)
Notes:	Source: Dissertations Abstracts International, Volume: 84-04, Section: B.
Contained By:	Dissertations Abstracts International84-04B.
Subject:	Aerospace engineering. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29065688click for full text (PQDT)
ISBN:	9798351445557

All-Electronic THz-Wave Gas Sensing via Absorption Spectroscopy.
Rice, Timothy Emre.

All-Electronic THz-Wave Gas Sensing via Absorption Spectroscopy. - 1 online resource (115 pages)

Source: Dissertations Abstracts International, Volume: 84-04, Section: B.

Thesis (Ph.D.)--Rensselaer Polytechnic Institute, 2022.

Includes bibliographical references

Gas sensing via THz-wave absorption spectroscopy is developed for the detection of several volatile organic compounds, halogenated hydrocarbons, and nitrogen-containing compounds using a broadband electronics-based THz wave spectrometer. Spectral absorption is characterized in the frequency range from 220 to 330 GHz, a region where atmospheric attenuation is minimal, scattering from particles and aerosols is negligible, spectral selectivity is high for the chosen compounds, and microelectronic radiation sources and detectors are being developed. The target compounds of the present study are important in industrial, chemical, combustion, environmental, agricultural, and medical processes in which gas sensors are desired. Experiments are conducted at room temperature and at pressures of 0.25−16 Torr, conditions where pressure-broadening (collisional line-broadening) often results in complex blended spectra. The observed transitions mostly exist for rotational absorption bands for ground vibrational states but some transitions are also observed for low-lying vibrationally-excited states. Where available, the measurements agree well with spectral simulations and documented line positions; however, most of the present experiments are the first-of-their-kind and there are not suitable experimental comparisons. Detection limits for remote gas sensing based on the electronic spectrometer are estimated to be of the order 10.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798351445557Subjects--Topical Terms:

1002622
Aerospace engineering.
Subjects--Index Terms:

MicroelectronicIndex Terms--Genre/Form:

542853
Electronic books.

All-Electronic THz-Wave Gas Sensing via Absorption Spectroscopy.
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100 1 $a Rice, Timothy Emre. $3 3694492
245 1 0 $a All-Electronic THz-Wave Gas Sensing via Absorption Spectroscopy.
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300 $a 1 online resource (115 pages)
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500 $a Source: Dissertations Abstracts International, Volume: 84-04, Section: B.
500 $a Advisor: Oehlschlaeger, Matthew.
502 $a Thesis (Ph.D.)--Rensselaer Polytechnic Institute, 2022.
504 $a Includes bibliographical references
520 $a Gas sensing via THz-wave absorption spectroscopy is developed for the detection of several volatile organic compounds, halogenated hydrocarbons, and nitrogen-containing compounds using a broadband electronics-based THz wave spectrometer. Spectral absorption is characterized in the frequency range from 220 to 330 GHz, a region where atmospheric attenuation is minimal, scattering from particles and aerosols is negligible, spectral selectivity is high for the chosen compounds, and microelectronic radiation sources and detectors are being developed. The target compounds of the present study are important in industrial, chemical, combustion, environmental, agricultural, and medical processes in which gas sensors are desired. Experiments are conducted at room temperature and at pressures of 0.25−16 Torr, conditions where pressure-broadening (collisional line-broadening) often results in complex blended spectra. The observed transitions mostly exist for rotational absorption bands for ground vibrational states but some transitions are also observed for low-lying vibrationally-excited states. Where available, the measurements agree well with spectral simulations and documented line positions; however, most of the present experiments are the first-of-their-kind and there are not suitable experimental comparisons. Detection limits for remote gas sensing based on the electronic spectrometer are estimated to be of the order 10.
520 $a (12)-10.
520 $a (13) molecules cm.
520 $a (-3) per meter pathlength. For dilute gases in air at 1 atm, detection limits range from 5 to 1,000 ppm per meter pathlength. The present study illustrates the potential for THz-wave quantitative gas sensing using all-electronic miniaturized systems for the polar gases of industrial relevance. As humanity becomes increasingly interested in the mitigation of anthropogenic greenhouse gases, local and global air pollution, and industrial air safety, inexpensive remote gas sensors, such as the type pursued in this thesis, should be in critical demand.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
650 4 $a Aerospace engineering. $3 1002622
650 4 $a Remote sensing. $3 535394
650 4 $a Mechanical engineering. $3 649730
653 $a Microelectronic
653 $a Millimeter-wave
653 $a Rotational
653 $a Sensing
653 $a Spectroscopy
653 $a Terahertz-wave
655 7 $a Electronic books. $2 lcsh $3 542853
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710 2 $a ProQuest Information and Learning Co. $3 783688
710 2 $a Rensselaer Polytechnic Institute. $b Aeronautical Engineering. $3 2093993
773 0 $t Dissertations Abstracts International $g 84-04B.
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29065688 $z click for full text (PQDT)