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Advances in SAW Gas Sensors Based on the Condensate-Adsorption Effect
A surface-acoustic-wave (SAW) gas sensor with a low detection limit and fast response for volatile organic compounds (VOCs) based on the condensate-adsorption effect detection is developed. In this sensor a gas chromatography (GC) column acts as the separator element and a dual-resonator oscillator...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Molecular Diversity Preservation International (MDPI)
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3252014/ https://www.ncbi.nlm.nih.gov/pubmed/22247697 http://dx.doi.org/10.3390/s111211871 |
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author | Liu, Jiuling Wang, Wen Li, Shunzhou Liu, Minghua He, Shitang |
author_facet | Liu, Jiuling Wang, Wen Li, Shunzhou Liu, Minghua He, Shitang |
author_sort | Liu, Jiuling |
collection | PubMed |
description | A surface-acoustic-wave (SAW) gas sensor with a low detection limit and fast response for volatile organic compounds (VOCs) based on the condensate-adsorption effect detection is developed. In this sensor a gas chromatography (GC) column acts as the separator element and a dual-resonator oscillator acts as the detector element. Regarding the surface effective permittivity method, the response mechanism analysis, which relates the condensate-adsorption effect, is performed, leading to the sensor performance prediction prior to fabrication. New designs of SAW resonators, which act as feedback of the oscillator, are devised in order to decrease the insertion loss and to achieve single-mode control, resulting in superior frequency stability of the oscillator. Based on the new phase modulation approach, excellent short-term frequency stability (±3 Hz/s) is achieved with the SAW oscillator by using the 500 MHz dual-port resonator as feedback element. In a sensor experiment investigating formaldehyde detection, the implemented SAW gas sensor exhibits an excellent threshold detection limit as low as 0.38 pg. |
format | Online Article Text |
id | pubmed-3252014 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | Molecular Diversity Preservation International (MDPI) |
record_format | MEDLINE/PubMed |
spelling | pubmed-32520142012-01-13 Advances in SAW Gas Sensors Based on the Condensate-Adsorption Effect Liu, Jiuling Wang, Wen Li, Shunzhou Liu, Minghua He, Shitang Sensors (Basel) Article A surface-acoustic-wave (SAW) gas sensor with a low detection limit and fast response for volatile organic compounds (VOCs) based on the condensate-adsorption effect detection is developed. In this sensor a gas chromatography (GC) column acts as the separator element and a dual-resonator oscillator acts as the detector element. Regarding the surface effective permittivity method, the response mechanism analysis, which relates the condensate-adsorption effect, is performed, leading to the sensor performance prediction prior to fabrication. New designs of SAW resonators, which act as feedback of the oscillator, are devised in order to decrease the insertion loss and to achieve single-mode control, resulting in superior frequency stability of the oscillator. Based on the new phase modulation approach, excellent short-term frequency stability (±3 Hz/s) is achieved with the SAW oscillator by using the 500 MHz dual-port resonator as feedback element. In a sensor experiment investigating formaldehyde detection, the implemented SAW gas sensor exhibits an excellent threshold detection limit as low as 0.38 pg. Molecular Diversity Preservation International (MDPI) 2011-12-20 /pmc/articles/PMC3252014/ /pubmed/22247697 http://dx.doi.org/10.3390/s111211871 Text en © 2011 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/). |
spellingShingle | Article Liu, Jiuling Wang, Wen Li, Shunzhou Liu, Minghua He, Shitang Advances in SAW Gas Sensors Based on the Condensate-Adsorption Effect |
title | Advances in SAW Gas Sensors Based on the Condensate-Adsorption Effect |
title_full | Advances in SAW Gas Sensors Based on the Condensate-Adsorption Effect |
title_fullStr | Advances in SAW Gas Sensors Based on the Condensate-Adsorption Effect |
title_full_unstemmed | Advances in SAW Gas Sensors Based on the Condensate-Adsorption Effect |
title_short | Advances in SAW Gas Sensors Based on the Condensate-Adsorption Effect |
title_sort | advances in saw gas sensors based on the condensate-adsorption effect |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3252014/ https://www.ncbi.nlm.nih.gov/pubmed/22247697 http://dx.doi.org/10.3390/s111211871 |
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