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Hydrogel-Based Plasmonic Sensor Substrate for the Detection of Ethanol
The in-line monitoring of ethanol concentration in liquids is a crucial part of process monitoring in breweries and distilleries. Current methods are based on infrared spectroscopy, which is time-consuming and costly, making these methods unaffordable for small and middle-sized companies. To overcom...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2019
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6470601/ https://www.ncbi.nlm.nih.gov/pubmed/30871145 http://dx.doi.org/10.3390/s19061264 |
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author | Kroh, Christoph Wuchrer, Roland Steinke, Nadja Guenther, Margarita Gerlach, Gerald Härtling, Thomas |
author_facet | Kroh, Christoph Wuchrer, Roland Steinke, Nadja Guenther, Margarita Gerlach, Gerald Härtling, Thomas |
author_sort | Kroh, Christoph |
collection | PubMed |
description | The in-line monitoring of ethanol concentration in liquids is a crucial part of process monitoring in breweries and distilleries. Current methods are based on infrared spectroscopy, which is time-consuming and costly, making these methods unaffordable for small and middle-sized companies. To overcome these problems, we presented a small, compact, and cost-effective sensing method for the ethanol content, based on a nanostructured, plasmonically active sensor substrate. The sensor substrate is coated with an ethanol-sensitive hydrogel, based on polyacrylamide and bisacrylamide, which induces a change in the refractive index of the substrate surface. The swelling and shrinking of such hydrogels offer a means to measure the ethanol content in liquids, which can be determined in a simple transmittance setup. In our study, we demonstrated the capability of the sensor principle for the detection of ethanol content ranging from 0 to 30 vol% ethanol. Furthermore, we determined the response time of the sensor substrate to be 5.2 min, which shows an improvement by a factor of four compared to other hydrogel-based sensing methods. Finally, initial results for the sensor’s lifetime are presented. |
format | Online Article Text |
id | pubmed-6470601 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-64706012019-04-26 Hydrogel-Based Plasmonic Sensor Substrate for the Detection of Ethanol Kroh, Christoph Wuchrer, Roland Steinke, Nadja Guenther, Margarita Gerlach, Gerald Härtling, Thomas Sensors (Basel) Article The in-line monitoring of ethanol concentration in liquids is a crucial part of process monitoring in breweries and distilleries. Current methods are based on infrared spectroscopy, which is time-consuming and costly, making these methods unaffordable for small and middle-sized companies. To overcome these problems, we presented a small, compact, and cost-effective sensing method for the ethanol content, based on a nanostructured, plasmonically active sensor substrate. The sensor substrate is coated with an ethanol-sensitive hydrogel, based on polyacrylamide and bisacrylamide, which induces a change in the refractive index of the substrate surface. The swelling and shrinking of such hydrogels offer a means to measure the ethanol content in liquids, which can be determined in a simple transmittance setup. In our study, we demonstrated the capability of the sensor principle for the detection of ethanol content ranging from 0 to 30 vol% ethanol. Furthermore, we determined the response time of the sensor substrate to be 5.2 min, which shows an improvement by a factor of four compared to other hydrogel-based sensing methods. Finally, initial results for the sensor’s lifetime are presented. MDPI 2019-03-13 /pmc/articles/PMC6470601/ /pubmed/30871145 http://dx.doi.org/10.3390/s19061264 Text en © 2019 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 Kroh, Christoph Wuchrer, Roland Steinke, Nadja Guenther, Margarita Gerlach, Gerald Härtling, Thomas Hydrogel-Based Plasmonic Sensor Substrate for the Detection of Ethanol |
title | Hydrogel-Based Plasmonic Sensor Substrate for the Detection of Ethanol |
title_full | Hydrogel-Based Plasmonic Sensor Substrate for the Detection of Ethanol |
title_fullStr | Hydrogel-Based Plasmonic Sensor Substrate for the Detection of Ethanol |
title_full_unstemmed | Hydrogel-Based Plasmonic Sensor Substrate for the Detection of Ethanol |
title_short | Hydrogel-Based Plasmonic Sensor Substrate for the Detection of Ethanol |
title_sort | hydrogel-based plasmonic sensor substrate for the detection of ethanol |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6470601/ https://www.ncbi.nlm.nih.gov/pubmed/30871145 http://dx.doi.org/10.3390/s19061264 |
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