Bimetallic Layers Increase Sensitivity of Affinity Sensors Based on Surface Plasmon Resonance
Two metals are used in resonant layers for chemical sensors based on surface plasmon resonance (SPR) - gold and silver. Gold displays higher shift of the resonance angle to changes of ambient refraction index and is chemically stable. Silver posses narrower resonance curve thus providing a higher si...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2002-02-01
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| Series: | Sensors |
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| Online Access: | http://www.mdpi.com/1424-8220/2/2/62/ |
| _version_ | 1828138651463188480 |
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| author | Yuri M. Shirshov Vladimir M. Mirsky Elena R. Surovtseva Anton V. Samoylov Stepan A. Zynio |
| author_facet | Yuri M. Shirshov Vladimir M. Mirsky Elena R. Surovtseva Anton V. Samoylov Stepan A. Zynio |
| author_sort | Yuri M. Shirshov |
| collection | DOAJ |
| description | Two metals are used in resonant layers for chemical sensors based on surface plasmon resonance (SPR) - gold and silver. Gold displays higher shift of the resonance angle to changes of ambient refraction index and is chemically stable. Silver posses narrower resonance curve thus providing a higher signal/noise ratio of SPR chemical sensors, but has a poor chemical stability. A new structure of resonant metallic film based on bimetallic silver/gold layers (gold as an outer layer) is suggested. It combines advantages of both gold and silver resonant layers. Bimetallic resonant films display so high shift of resonance angle on changes of ambient refraction index as gold films, but show narrower resonance curve, thus providing a higher signal / noise ratio. Additionally, the outer gold layer protects silver against oxidation. |
| first_indexed | 2024-04-11T18:40:12Z |
| format | Article |
| id | doaj.art-e716e6b59c9640f8a5b3f60a9e4dedbe |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T18:40:12Z |
| publishDate | 2002-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-e716e6b59c9640f8a5b3f60a9e4dedbe2022-12-22T04:09:03ZengMDPI AGSensors1424-82202002-02-0122627010.3390/s20200062Bimetallic Layers Increase Sensitivity of Affinity Sensors Based on Surface Plasmon ResonanceYuri M. ShirshovVladimir M. MirskyElena R. SurovtsevaAnton V. SamoylovStepan A. ZynioTwo metals are used in resonant layers for chemical sensors based on surface plasmon resonance (SPR) - gold and silver. Gold displays higher shift of the resonance angle to changes of ambient refraction index and is chemically stable. Silver posses narrower resonance curve thus providing a higher signal/noise ratio of SPR chemical sensors, but has a poor chemical stability. A new structure of resonant metallic film based on bimetallic silver/gold layers (gold as an outer layer) is suggested. It combines advantages of both gold and silver resonant layers. Bimetallic resonant films display so high shift of resonance angle on changes of ambient refraction index as gold films, but show narrower resonance curve, thus providing a higher signal / noise ratio. Additionally, the outer gold layer protects silver against oxidation.http://www.mdpi.com/1424-8220/2/2/62/Surface plasmon resonanceBiosensorSensitivitySignal / noise ratio |
| spellingShingle | Yuri M. Shirshov Vladimir M. Mirsky Elena R. Surovtseva Anton V. Samoylov Stepan A. Zynio Bimetallic Layers Increase Sensitivity of Affinity Sensors Based on Surface Plasmon Resonance Sensors Surface plasmon resonance Biosensor Sensitivity Signal / noise ratio |
| title | Bimetallic Layers Increase Sensitivity of Affinity Sensors Based on Surface Plasmon Resonance |
| title_full | Bimetallic Layers Increase Sensitivity of Affinity Sensors Based on Surface Plasmon Resonance |
| title_fullStr | Bimetallic Layers Increase Sensitivity of Affinity Sensors Based on Surface Plasmon Resonance |
| title_full_unstemmed | Bimetallic Layers Increase Sensitivity of Affinity Sensors Based on Surface Plasmon Resonance |
| title_short | Bimetallic Layers Increase Sensitivity of Affinity Sensors Based on Surface Plasmon Resonance |
| title_sort | bimetallic layers increase sensitivity of affinity sensors based on surface plasmon resonance |
| topic | Surface plasmon resonance Biosensor Sensitivity Signal / noise ratio |
| url | http://www.mdpi.com/1424-8220/2/2/62/ |
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