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An Improved Split-Ring Resonator-Based Sensor for Microfluidic Applications
This study proposes an ultrahigh-sensitivity split-ring resonator-based microwave sensor for retrieving the complex permittivity of liquid samples. An interdigital capacitor structure was used to expand the sensing area and the sensitivity. A defected ground structure and A parallel dual split-ring...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9656671/ https://www.ncbi.nlm.nih.gov/pubmed/36366234 http://dx.doi.org/10.3390/s22218534 |
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author | Ye, Wei Wang, Da-Wei Wang, Jing Wang, Gaofeng Zhao, Wen-Sheng |
author_facet | Ye, Wei Wang, Da-Wei Wang, Jing Wang, Gaofeng Zhao, Wen-Sheng |
author_sort | Ye, Wei |
collection | PubMed |
description | This study proposes an ultrahigh-sensitivity split-ring resonator-based microwave sensor for retrieving the complex permittivity of liquid samples. An interdigital capacitor structure was used to expand the sensing area and the sensitivity. A defected ground structure and A parallel dual split-ring resonator were introduced to improve the quality factor. A polydimethylsiloxane microfluidic channel substrate was placed above the interdigital capacitor structure. The channel route coincided with the interdigital gap to fully utilize the strong electric field. Ethanol–water solutions with varying ethanol fractions were injected into the channel as the testing liquid. It was demonstrated that the variation in resonant frequency can be used to retrieve the dielectric properties of liquid samples. The proposed sensor used a small liquid volume of ~0.68 μL and provided values in good agreement with the reference data. |
format | Online Article Text |
id | pubmed-9656671 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-96566712022-11-15 An Improved Split-Ring Resonator-Based Sensor for Microfluidic Applications Ye, Wei Wang, Da-Wei Wang, Jing Wang, Gaofeng Zhao, Wen-Sheng Sensors (Basel) Article This study proposes an ultrahigh-sensitivity split-ring resonator-based microwave sensor for retrieving the complex permittivity of liquid samples. An interdigital capacitor structure was used to expand the sensing area and the sensitivity. A defected ground structure and A parallel dual split-ring resonator were introduced to improve the quality factor. A polydimethylsiloxane microfluidic channel substrate was placed above the interdigital capacitor structure. The channel route coincided with the interdigital gap to fully utilize the strong electric field. Ethanol–water solutions with varying ethanol fractions were injected into the channel as the testing liquid. It was demonstrated that the variation in resonant frequency can be used to retrieve the dielectric properties of liquid samples. The proposed sensor used a small liquid volume of ~0.68 μL and provided values in good agreement with the reference data. MDPI 2022-11-05 /pmc/articles/PMC9656671/ /pubmed/36366234 http://dx.doi.org/10.3390/s22218534 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Ye, Wei Wang, Da-Wei Wang, Jing Wang, Gaofeng Zhao, Wen-Sheng An Improved Split-Ring Resonator-Based Sensor for Microfluidic Applications |
title | An Improved Split-Ring Resonator-Based Sensor for Microfluidic Applications |
title_full | An Improved Split-Ring Resonator-Based Sensor for Microfluidic Applications |
title_fullStr | An Improved Split-Ring Resonator-Based Sensor for Microfluidic Applications |
title_full_unstemmed | An Improved Split-Ring Resonator-Based Sensor for Microfluidic Applications |
title_short | An Improved Split-Ring Resonator-Based Sensor for Microfluidic Applications |
title_sort | improved split-ring resonator-based sensor for microfluidic applications |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9656671/ https://www.ncbi.nlm.nih.gov/pubmed/36366234 http://dx.doi.org/10.3390/s22218534 |
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