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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...

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Detalles Bibliográficos
Autores principales: Ye, Wei, Wang, Da-Wei, Wang, Jing, Wang, Gaofeng, Zhao, Wen-Sheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
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.
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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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