Coupling between topological edge state and defect mode-based biosensor using phononic crystal
Abstract A wealth of details regarding an individual’s state of health, like a person’s respiratory and metabolic functioning, can be studied by analyzing the volatile molecules and atoms in human exhaled breath. Besides, the salinity of seawater is a crucial factor in understanding its characterist...
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Nature Portfolio
2025-01-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-85195-9 |
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| author | Zaky A. Zaky M. Al-Dossari Ahmed S. Hendy Yassine Bouazzi Attia Boudjemline Arafa H. Aly |
| author_facet | Zaky A. Zaky M. Al-Dossari Ahmed S. Hendy Yassine Bouazzi Attia Boudjemline Arafa H. Aly |
| author_sort | Zaky A. Zaky |
| collection | DOAJ |
| description | Abstract A wealth of details regarding an individual’s state of health, like a person’s respiratory and metabolic functioning, can be studied by analyzing the volatile molecules and atoms in human exhaled breath. Besides, the salinity of seawater is a crucial factor in understanding its characteristics because any variation in the salinity of seawater represents the variations in the hydrological, biological, and chemical distributions. In this paper, a symmetrical one-dimensional phononic structure is theoretically designed using two symmetrical crystals separated with a defective cavity. This structure has been designed to excite a topological edge state coupled with defect mode. The coupled mode achieves high sensitivity to NaCl concentration in an aqueous solution, seven times higher than the defective one. By ranging the NaCl concentration from 0 to 21%, the average sensitivity is 467 and 3160 Hz/% for defect mode and coupled modes, respectively. The bandwidth of the coupled mode of 170 Hz is much narrower than that of the defect mode of 671 Hz for detecting salinity. For detecting the increase in $$\:C{O}_{2}$$ concentration in dry exhaled breath by ranging the $$\:C{O}_{2}$$ concentration from 0 ppm to 100 ppm, the average sensitivity is $$\:32$$ Hz/ppm for coupled mode. As a result of these enhancements in the sensitivity and bandwidth of the coupled mode, the coupled mode is recommended to be used in different biosensing applications. |
| format | Article |
| id | doaj-art-71957564cfa74fe792cbe75758639f3e |
| institution | Kabale University |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-71957564cfa74fe792cbe75758639f3e2025-01-19T12:18:07ZengNature PortfolioScientific Reports2045-23222025-01-0115111610.1038/s41598-025-85195-9Coupling between topological edge state and defect mode-based biosensor using phononic crystalZaky A. Zaky0M. Al-Dossari1Ahmed S. Hendy2Yassine Bouazzi3Attia Boudjemline4Arafa H. Aly5TH-PPM Group, Physics Department, Faculty of Science, Beni-Suef UniversityDahran Aljanoub Applied College, King Khalid UniversityDepartment of Computational Mathematics and Computer Science, Institute of Natural Sciences and Mathematics, Ural Federal UniversityDepartment of Industrial Engineering, College of Engineering, University of Ha’ilDepartment of Industrial Engineering, College of Engineering, University of Ha’ilTH-PPM Group, Physics Department, Faculty of Science, Beni-Suef UniversityAbstract A wealth of details regarding an individual’s state of health, like a person’s respiratory and metabolic functioning, can be studied by analyzing the volatile molecules and atoms in human exhaled breath. Besides, the salinity of seawater is a crucial factor in understanding its characteristics because any variation in the salinity of seawater represents the variations in the hydrological, biological, and chemical distributions. In this paper, a symmetrical one-dimensional phononic structure is theoretically designed using two symmetrical crystals separated with a defective cavity. This structure has been designed to excite a topological edge state coupled with defect mode. The coupled mode achieves high sensitivity to NaCl concentration in an aqueous solution, seven times higher than the defective one. By ranging the NaCl concentration from 0 to 21%, the average sensitivity is 467 and 3160 Hz/% for defect mode and coupled modes, respectively. The bandwidth of the coupled mode of 170 Hz is much narrower than that of the defect mode of 671 Hz for detecting salinity. For detecting the increase in $$\:C{O}_{2}$$ concentration in dry exhaled breath by ranging the $$\:C{O}_{2}$$ concentration from 0 ppm to 100 ppm, the average sensitivity is $$\:32$$ Hz/ppm for coupled mode. As a result of these enhancements in the sensitivity and bandwidth of the coupled mode, the coupled mode is recommended to be used in different biosensing applications.https://doi.org/10.1038/s41598-025-85195-9BiosensorPhononic crystalSymmetric structuresBandgapTopological edge state |
| spellingShingle | Zaky A. Zaky M. Al-Dossari Ahmed S. Hendy Yassine Bouazzi Attia Boudjemline Arafa H. Aly Coupling between topological edge state and defect mode-based biosensor using phononic crystal Scientific Reports Biosensor Phononic crystal Symmetric structures Bandgap Topological edge state |
| title | Coupling between topological edge state and defect mode-based biosensor using phononic crystal |
| title_full | Coupling between topological edge state and defect mode-based biosensor using phononic crystal |
| title_fullStr | Coupling between topological edge state and defect mode-based biosensor using phononic crystal |
| title_full_unstemmed | Coupling between topological edge state and defect mode-based biosensor using phononic crystal |
| title_short | Coupling between topological edge state and defect mode-based biosensor using phononic crystal |
| title_sort | coupling between topological edge state and defect mode based biosensor using phononic crystal |
| topic | Biosensor Phononic crystal Symmetric structures Bandgap Topological edge state |
| url | https://doi.org/10.1038/s41598-025-85195-9 |
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