Improving the Detection Accuracy of an Ag/Au Bimetallic Surface Plasmon Resonance Biosensor Based on Graphene
A theoretical study was conducted with the aim of improving the detection accuracy of graphene-based surface plasmon resonance (SPR) biosensors. We studied the effect of applying a bias voltage to the sensor surface on its detection accuracy. The optimum thicknesses of silver and gold layers in the...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-12-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/10/1/10 |
| _version_ | 1797495110307414016 |
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| author | Qi Wang Shuhua Cao Xufeng Gao Xinrui Chen Dawei Zhang |
| author_facet | Qi Wang Shuhua Cao Xufeng Gao Xinrui Chen Dawei Zhang |
| author_sort | Qi Wang |
| collection | DOAJ |
| description | A theoretical study was conducted with the aim of improving the detection accuracy of graphene-based surface plasmon resonance (SPR) biosensors. We studied the effect of applying a bias voltage to the sensor surface on its detection accuracy. The optimum thicknesses of silver and gold layers in the biosensor of 47 nm and 3 nm, respectively, were determined. Graphene layers deposited on these thin silver and gold films formed a sensor surface system, on which the surface plasmons were excited. The real and imaginary parts of the refractive index of graphene were controlled by the bias voltage. When the chemical potential was increased from 36 meV to 8 eV, the detection accuracy of the sensor was correspondingly increased by 213%. |
| first_indexed | 2024-03-10T01:43:45Z |
| format | Article |
| id | doaj.art-eb63bcaffebd46649fed58a6e9f5e137 |
| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-10T01:43:45Z |
| publishDate | 2021-12-01 |
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| series | Chemosensors |
| spelling | doaj.art-eb63bcaffebd46649fed58a6e9f5e1372023-11-23T13:19:45ZengMDPI AGChemosensors2227-90402021-12-011011010.3390/chemosensors10010010Improving the Detection Accuracy of an Ag/Au Bimetallic Surface Plasmon Resonance Biosensor Based on GrapheneQi Wang0Shuhua Cao1Xufeng Gao2Xinrui Chen3Dawei Zhang4Shanghai Key Laboratory of Modern Optics System, Engineering Research Center of Optical Instrument and System, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, 516 Jungong Rd, Shanghai 200093, ChinaShanghai Key Laboratory of Modern Optics System, Engineering Research Center of Optical Instrument and System, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, 516 Jungong Rd, Shanghai 200093, ChinaShanghai Key Laboratory of Modern Optics System, Engineering Research Center of Optical Instrument and System, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, 516 Jungong Rd, Shanghai 200093, ChinaShanghai Key Laboratory of Modern Optics System, Engineering Research Center of Optical Instrument and System, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, 516 Jungong Rd, Shanghai 200093, ChinaShanghai Key Laboratory of Modern Optics System, Engineering Research Center of Optical Instrument and System, School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, 516 Jungong Rd, Shanghai 200093, ChinaA theoretical study was conducted with the aim of improving the detection accuracy of graphene-based surface plasmon resonance (SPR) biosensors. We studied the effect of applying a bias voltage to the sensor surface on its detection accuracy. The optimum thicknesses of silver and gold layers in the biosensor of 47 nm and 3 nm, respectively, were determined. Graphene layers deposited on these thin silver and gold films formed a sensor surface system, on which the surface plasmons were excited. The real and imaginary parts of the refractive index of graphene were controlled by the bias voltage. When the chemical potential was increased from 36 meV to 8 eV, the detection accuracy of the sensor was correspondingly increased by 213%.https://www.mdpi.com/2227-9040/10/1/10surface plasmon resonancechalcogenide prismgraphenedetection accuracychemical potential |
| spellingShingle | Qi Wang Shuhua Cao Xufeng Gao Xinrui Chen Dawei Zhang Improving the Detection Accuracy of an Ag/Au Bimetallic Surface Plasmon Resonance Biosensor Based on Graphene Chemosensors surface plasmon resonance chalcogenide prism graphene detection accuracy chemical potential |
| title | Improving the Detection Accuracy of an Ag/Au Bimetallic Surface Plasmon Resonance Biosensor Based on Graphene |
| title_full | Improving the Detection Accuracy of an Ag/Au Bimetallic Surface Plasmon Resonance Biosensor Based on Graphene |
| title_fullStr | Improving the Detection Accuracy of an Ag/Au Bimetallic Surface Plasmon Resonance Biosensor Based on Graphene |
| title_full_unstemmed | Improving the Detection Accuracy of an Ag/Au Bimetallic Surface Plasmon Resonance Biosensor Based on Graphene |
| title_short | Improving the Detection Accuracy of an Ag/Au Bimetallic Surface Plasmon Resonance Biosensor Based on Graphene |
| title_sort | improving the detection accuracy of an ag au bimetallic surface plasmon resonance biosensor based on graphene |
| topic | surface plasmon resonance chalcogenide prism graphene detection accuracy chemical potential |
| url | https://www.mdpi.com/2227-9040/10/1/10 |
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