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    Terahertz-wave absorption gas sensing for dimethyl sulfoxide

    Author
    Passarelli, Alec
    ORCID
    https://orcid.org/0000-0003-3494-8492
    View/Open
    Passarelli_rpi_0185N_12005.pdf (990.9Kb)
    Other Contributors
    Oehlschlaeger, Matthew A.; Borca-Tasçiuc, Theodorian; Anderson, Kurt S.;
    Date Issued
    2022-05
    Subject
    Mechanical engineering
    Degree
    MS;
    Terms of Use
    This electronic version is a licensed copy owned by Rensselaer Polytechnic Institute (RPI), Troy, NY. Copyright of original work retained by author.;
    Metadata
    Show full item record
    URI
    https://hdl.handle.net/20.500.13015/5919
    Abstract
    Rotational absorption spectroscopy for dimethyl sulfoxide (DMSO) is characterized in the 220-330 GHz frequency range using a robust electronic THz-wave spectrometer, for the development of THz gas sensing for this compound of commercial relevance. DMSO is a common solvent used in many food, pharmaceutical, and manufacturing applications, and can present danger to human health and the work environment; hence, remote gas sensors for DMSO environmental and process monitoring are desired. Absorption measurements were carried out for pure DMSO at 297 K and 0.4 Torr. DMSO was shown to have a unique rotational fingerprint with series of repeating absorption features. The frequencies of transitions observed in the present study are found to be in good agreement with prior experimental work and spectral simulations based on rotational parameters. The sensor developed here exhibits a detection limit of 1.3-2.6 x 1015 DMSO molecules/cm3 per meter of absorption pathlength, with the potential for greater sensitivity with signal-to-noise improvements. The study illustrates the potential of all electronic THz-wave systems for miniaturized remote gas sensors;
    Description
    May 2022; School of Engineering
    Department
    Dept. of Mechanical, Aerospace, and Nuclear Engineering;
    Publisher
    Rensselaer Polytechnic Institute, Troy, NY
    Relationships
    Rensselaer Theses and Dissertations Online Collection;
    Access
    Restricted to current Rensselaer faculty, staff and students in accordance with the Rensselaer Standard license. Access inquiries may be directed to the Rensselaer Libraries.;
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    • RPI Theses Online (Complete)

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