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 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.

Export metadata

Additional Services

Search Google Scholar
Metadaten
Author: Stepan A. Zynio, Anton V. Samoylov, Elena R. Surovtseva, Vladimir M. MirskyORCiDGND, Yuri M. Shirshov
DOI:https://doi.org/10.3390/s20200062
ISSN:1424-8220
Title of the source (English):Sensors
Document Type:Scientific journal article peer-reviewed
Language:English
Year of publication:2002
Tag:Biosensor; Sensitivity; Signal / noise ratio; Surface plasmon resonance
Volume/Year:2
Issue number:2
First Page:62
Last Page:70
Faculty/Chair:Fakultät 2 Umwelt und Naturwissenschaften / FG Nanobiotechnologie
Einverstanden ✔
Diese Webseite verwendet technisch erforderliche Session-Cookies. Durch die weitere Nutzung der Webseite stimmen Sie diesem zu. Unsere Datenschutzerklärung finden Sie hier.