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Long-Term Stability of Polymer-Coated Surface Transverse Wave Sensors for the Detection of Organic Solvent Vapors
Arrays with polymer-coated acoustic sensors, such as surface acoustic wave (SAW) and surface transverse wave (STW) sensors, have successfully been applied for a variety of gas sensing applications. However, the stability of the sensors’ polymer coatings over a longer period of use has hardly been in...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5713134/ https://www.ncbi.nlm.nih.gov/pubmed/29099762 http://dx.doi.org/10.3390/s17112529 |
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author | Stahl, Ullrich Voigt, Achim Dirschka, Marian Barié, Nicole Richter, Christiane Waldbaur, Ansgar Gruhl, Friederike J. Rapp, Bastian E. Rapp, Michael Länge, Kerstin |
author_facet | Stahl, Ullrich Voigt, Achim Dirschka, Marian Barié, Nicole Richter, Christiane Waldbaur, Ansgar Gruhl, Friederike J. Rapp, Bastian E. Rapp, Michael Länge, Kerstin |
author_sort | Stahl, Ullrich |
collection | PubMed |
description | Arrays with polymer-coated acoustic sensors, such as surface acoustic wave (SAW) and surface transverse wave (STW) sensors, have successfully been applied for a variety of gas sensing applications. However, the stability of the sensors’ polymer coatings over a longer period of use has hardly been investigated. We used an array of eight STW resonator sensors coated with different polymers. This sensor array was used at semi-annual intervals for a three-year period to detect organic solvent vapors of three different chemical classes: a halogenated hydrocarbon (chloroform), an aliphatic hydrocarbon (octane), and an aromatic hydrocarbon (xylene). The sensor signals were evaluated with regard to absolute signal shifts and normalized signal shifts leading to signal patterns characteristic of the respective solvent vapors. No significant time-related changes of sensor signals or signal patterns were observed, i.e., the polymer coatings kept their performance during the course of the study. Therefore, the polymer-coated STW sensors proved to be robust devices which can be used for detecting organic solvent vapors both qualitatively and quantitatively for several years. |
format | Online Article Text |
id | pubmed-5713134 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-57131342017-12-07 Long-Term Stability of Polymer-Coated Surface Transverse Wave Sensors for the Detection of Organic Solvent Vapors Stahl, Ullrich Voigt, Achim Dirschka, Marian Barié, Nicole Richter, Christiane Waldbaur, Ansgar Gruhl, Friederike J. Rapp, Bastian E. Rapp, Michael Länge, Kerstin Sensors (Basel) Article Arrays with polymer-coated acoustic sensors, such as surface acoustic wave (SAW) and surface transverse wave (STW) sensors, have successfully been applied for a variety of gas sensing applications. However, the stability of the sensors’ polymer coatings over a longer period of use has hardly been investigated. We used an array of eight STW resonator sensors coated with different polymers. This sensor array was used at semi-annual intervals for a three-year period to detect organic solvent vapors of three different chemical classes: a halogenated hydrocarbon (chloroform), an aliphatic hydrocarbon (octane), and an aromatic hydrocarbon (xylene). The sensor signals were evaluated with regard to absolute signal shifts and normalized signal shifts leading to signal patterns characteristic of the respective solvent vapors. No significant time-related changes of sensor signals or signal patterns were observed, i.e., the polymer coatings kept their performance during the course of the study. Therefore, the polymer-coated STW sensors proved to be robust devices which can be used for detecting organic solvent vapors both qualitatively and quantitatively for several years. MDPI 2017-11-03 /pmc/articles/PMC5713134/ /pubmed/29099762 http://dx.doi.org/10.3390/s17112529 Text en © 2017 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 (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Stahl, Ullrich Voigt, Achim Dirschka, Marian Barié, Nicole Richter, Christiane Waldbaur, Ansgar Gruhl, Friederike J. Rapp, Bastian E. Rapp, Michael Länge, Kerstin Long-Term Stability of Polymer-Coated Surface Transverse Wave Sensors for the Detection of Organic Solvent Vapors |
title | Long-Term Stability of Polymer-Coated Surface Transverse Wave Sensors for the Detection of Organic Solvent Vapors |
title_full | Long-Term Stability of Polymer-Coated Surface Transverse Wave Sensors for the Detection of Organic Solvent Vapors |
title_fullStr | Long-Term Stability of Polymer-Coated Surface Transverse Wave Sensors for the Detection of Organic Solvent Vapors |
title_full_unstemmed | Long-Term Stability of Polymer-Coated Surface Transverse Wave Sensors for the Detection of Organic Solvent Vapors |
title_short | Long-Term Stability of Polymer-Coated Surface Transverse Wave Sensors for the Detection of Organic Solvent Vapors |
title_sort | long-term stability of polymer-coated surface transverse wave sensors for the detection of organic solvent vapors |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5713134/ https://www.ncbi.nlm.nih.gov/pubmed/29099762 http://dx.doi.org/10.3390/s17112529 |
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