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A Liquid Crystal-Modulated Metastructure Sensor for Biosensing

In this paper, a liquid crystal-modulated metastructure sensor (MS) is proposed that can detect the refractive index (RI) of a liquid and change the detection range under different applied voltages. The regulation of the detection range is based on the different bias states of the liquid crystal at...

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Autores principales: Liao, Siyuan, Chen, Qi, Ma, Haocheng, Huang, Jingwei, Sui, Junyang, Zhang, Haifeng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10458214/
https://www.ncbi.nlm.nih.gov/pubmed/37631661
http://dx.doi.org/10.3390/s23167122
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author Liao, Siyuan
Chen, Qi
Ma, Haocheng
Huang, Jingwei
Sui, Junyang
Zhang, Haifeng
author_facet Liao, Siyuan
Chen, Qi
Ma, Haocheng
Huang, Jingwei
Sui, Junyang
Zhang, Haifeng
author_sort Liao, Siyuan
collection PubMed
description In this paper, a liquid crystal-modulated metastructure sensor (MS) is proposed that can detect the refractive index (RI) of a liquid and change the detection range under different applied voltages. The regulation of the detection range is based on the different bias states of the liquid crystal at different voltages. By changing the sample in the cavity that is to be detected, the overall electromagnetic characteristics of the device in the resonant state are modified, thus changing the position of the absorption peaks so that different RI correspond to different absorption peaks, and finally realizing the sensing detection. The refractive index unit is denoted as RIU. The range of the refractive index detection is 1.414–2.828 and 2.121–3.464, and the corresponding absorption peak variation range is 0.8485–1.028 THz and 0.7295–0.8328 THz, with a sensitivity of 123.8 GHz/RIU and 75.6 GHz/RIU, respectively. In addition, an approach to optimizing resonant absorption peaks is explored, which can suppress unwanted absorption generated during the design process by analyzing the energy distribution and directing the current flow on the substrate. Four variables that have a more obvious impact on performance are listed, and the selection and change trend of the numerical values are focused on, fully considering the errors that may be caused by manufacturing and actual use. At the same time, the incident angle and polarization angle are also included in the considered range, and the device shows good stability at these angles. Finally, the influence of the number of resonant rings on the sensing performance is also discussed, and its conclusion has guiding value for optimizing the sensing demand. This new liquid crystal-modulated MS has the advantages of a small size and high sensitivity and is expected to be used for bio-detection, sensing, and so on. All results in this work were obtained with the aid of simulations based on the finite element method.
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spelling pubmed-104582142023-08-27 A Liquid Crystal-Modulated Metastructure Sensor for Biosensing Liao, Siyuan Chen, Qi Ma, Haocheng Huang, Jingwei Sui, Junyang Zhang, Haifeng Sensors (Basel) Article In this paper, a liquid crystal-modulated metastructure sensor (MS) is proposed that can detect the refractive index (RI) of a liquid and change the detection range under different applied voltages. The regulation of the detection range is based on the different bias states of the liquid crystal at different voltages. By changing the sample in the cavity that is to be detected, the overall electromagnetic characteristics of the device in the resonant state are modified, thus changing the position of the absorption peaks so that different RI correspond to different absorption peaks, and finally realizing the sensing detection. The refractive index unit is denoted as RIU. The range of the refractive index detection is 1.414–2.828 and 2.121–3.464, and the corresponding absorption peak variation range is 0.8485–1.028 THz and 0.7295–0.8328 THz, with a sensitivity of 123.8 GHz/RIU and 75.6 GHz/RIU, respectively. In addition, an approach to optimizing resonant absorption peaks is explored, which can suppress unwanted absorption generated during the design process by analyzing the energy distribution and directing the current flow on the substrate. Four variables that have a more obvious impact on performance are listed, and the selection and change trend of the numerical values are focused on, fully considering the errors that may be caused by manufacturing and actual use. At the same time, the incident angle and polarization angle are also included in the considered range, and the device shows good stability at these angles. Finally, the influence of the number of resonant rings on the sensing performance is also discussed, and its conclusion has guiding value for optimizing the sensing demand. This new liquid crystal-modulated MS has the advantages of a small size and high sensitivity and is expected to be used for bio-detection, sensing, and so on. All results in this work were obtained with the aid of simulations based on the finite element method. MDPI 2023-08-11 /pmc/articles/PMC10458214/ /pubmed/37631661 http://dx.doi.org/10.3390/s23167122 Text en © 2023 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
Liao, Siyuan
Chen, Qi
Ma, Haocheng
Huang, Jingwei
Sui, Junyang
Zhang, Haifeng
A Liquid Crystal-Modulated Metastructure Sensor for Biosensing
title A Liquid Crystal-Modulated Metastructure Sensor for Biosensing
title_full A Liquid Crystal-Modulated Metastructure Sensor for Biosensing
title_fullStr A Liquid Crystal-Modulated Metastructure Sensor for Biosensing
title_full_unstemmed A Liquid Crystal-Modulated Metastructure Sensor for Biosensing
title_short A Liquid Crystal-Modulated Metastructure Sensor for Biosensing
title_sort liquid crystal-modulated metastructure sensor for biosensing
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10458214/
https://www.ncbi.nlm.nih.gov/pubmed/37631661
http://dx.doi.org/10.3390/s23167122
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