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Description:

For practical olfactory sensing with a safe and low- power system, it is important to be able to operate easily at room temperature. However, this has not been a trivial task to achieve with existing conventional gas separation and sensing devices. In this study, a novel compact room temperature-operated sensing system is proposed to separate and quantify each component in a vapor mixture with simple operation. The sensing system consists of a portable and replaceable gas separation column and a sensing module containing a nanomechanical Membrane-type Surface stress Sensor, MSS. Proton transfer reaction time-of- flight mass spectrometry (PTR-TOF-MS) results show that the gas separation column can clearly separate methanol and ethanol in their mixtures. The sensing signals from the column-MSS system are consistent with the peaks measured by PTR-TOF-MS. For mixtures of methanol and ethanol with various ratios, a clear correspondence is observed between the output signals and the theoretically calculated vapor pressure ratios of each mixture. The developed compact room temperature-operated sensing system can discriminate and quantify different methanol and ethanol mixtures, paving the way for practical applications of olfactory sensing devices.

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  © 2024 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

Keyword: olfactory sensors, room temperature-operated, real-time, gas mixture, separation, quantification, Membrane-type Surface stress Sensor (MSS)

Date published: 2024-10-20

Publisher: IEEE

Journal:

• 2024 IEEE SENSORS (ISSN: 21689229) p. 1-4

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Funding:

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5233

First published URL: https://doi.org/10.1109/sensors60989.2024.10784477

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Updated at: 2024-12-28 16:30:43 +0900

Published on MDR: 2024-12-28 16:30:43 +0900