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Published (Version of record)CC BY V4.0, Open Access
Published (Version of record)CC BY V4.0, Open
Journal article
Sensing Signal Augmentation by Flow Rate Modulation of Carrier Gas for Accurate Differentiation of Complex Odours
Science and technology of advanced materials, Vol.25(1), 2408212
16/10/2024
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Abstract
For olfactory sensors, clear differentiation of complex odour samples requires diverse information. To obtain such information, hardware modifications, such as introducing additional channels with different physical/chemical properties, are usually needed. In this study, we present a new approach to augment the sensing signals of an olfactory sensor by modulating the flow rate of the carrier gas. The headspace vapour of complex odours is measured using a sensing system of nanomechanical sensor (Membrane-type Surface stress Sensor, MSS). The resulting data set is quantitatively evaluated using the Davies-Boulding index (DBI) of principal component analysis (PCA). The increasing number of sensing signals obtained at different gas flow rates leads to a decrease in the DBI, achieving better cluster separation between different odours. Such gas flow effects can be attributed to several factors, including the sample evaporation and the equilibrium of the gas-liquid and gas-solid interfaces. Proton-transfer-reaction time-of-flight mass spectrometry (PTR-TOF-MS) experiments reveal that the compositions of odour samples vary with the different gas flow rates. It is demonstrated that a simple technique of modulating gas flow rates can significantly improve the differentiation performance of complex odours, providing additional degree of freedom in olfactory sensing.
Details
- Title
- Sensing Signal Augmentation by Flow Rate Modulation of Carrier Gas for Accurate Differentiation of Complex Odours
- Creators
- Meng-Qun Feng (Author) - Research Center for Macromolecules and Biomaterials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, 305-0044, Ibaraki, JapanTanju Yildirim (Author) - Southern Cross UniversityKosuke Minami (Author) - Research Center for Macromolecules and Biomaterials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, 305-0044, Ibaraki, JapanKota Shiba (Author) - Research Center for Macromolecules and Biomaterials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, 305-0044, Ibaraki, JapanGenki Yoshikawa (Author) - Research Center for Macromolecules and Biomaterials, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, 305-0044, Ibaraki, Japan
- Publication Details
- Science and technology of advanced materials, Vol.25(1), 2408212
- Publisher
- Taylor & Francis Group
- Grant note
- This study was financially supported partially by a Grant-in-Aid for Challenging Research (Pioneering), JSPS, MEXT, Japan [no. 20K20554] and the Public/Private R&D Investment Strategic Expansion Program (PRISM), Cabinet Office, Japan.
- Identifiers
- 991013225810402368
- Copyright
- © 2024 The Author(s)
- Academic Unit
- Faculty of Science and Engineering
- Language
- English
- Resource Type
- Journal article