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Biosensors based on surface plasmon-enhanced fluorescence spectroscopy
Jakub Dostálek1, Wolfgang Knoll
1Max Planck Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany. dostalek@mpip-mainz.mpg.de
Biointerphases
|April 23, 2010
Summary
Surface plasmon-enhanced fluorescence spectroscopy (SPFS) significantly boosts the sensitivity of surface plasmon resonance (SPR) biosensors. This technique enhances fluorescence detection, enabling the analysis of extremely low analyte concentrations and small molecules.
Area of Science:
- Analytical Chemistry
- Spectroscopy
- Biosensing Technology
Background:
- Surface plasmon resonance (SPR) biosensors detect molecular binding via refractive index changes, suitable for large molecules.
- Traditional SPR struggles with detecting small molecules or samples with very low analyte concentrations.
Purpose of the Study:
- To review the principles, implementations, and applications of surface plasmon-enhanced fluorescence spectroscopy (SPFS) in SPR biosensors.
- To highlight how SPFS overcomes limitations of conventional SPR biosensing.
Main Methods:
- Integration of SPFS with SPR biosensor platforms.
- Utilizing surface plasmons on continuous metal-dielectric interfaces for enhanced electromagnetic fields.
- Detection of fluorescence from captured, fluorophore-labeled molecules.
Main Results:
- SPFS increases biosensor sensitivity by several orders of magnitude.
- Enhanced excitation and collection of fluorescence light lead to significantly improved signal detection.
- SPFS enables the detection of small molecules and analysis of samples with extremely low analyte concentrations.
Conclusions:
- SPFS significantly enhances the performance of SPR biosensors, expanding their detection capabilities.
- This technique offers a powerful tool for sensitive analysis of analytes, including small molecules and low concentrations.
- The review focuses on SPFS implementations utilizing continuous metal-dielectric interfaces.
