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Evanescent resonator chips: a universal platform with superior sensitivity for fluorescence-based microarrays
Dieter Neuschäfer1, Wolfgang Budach, Christoph Wanke
1Novartis Pharma AG, CH-4002 Basel, Switzerland. dieter.neuschafer@pharma.novartis.com
Biosensors & Bioelectronics
|February 27, 2003
Summary
We developed a novel evanescent resonator (ER) platform, a universal fluorescence transducer. This technology significantly amplifies fluorescence signals, enabling over 100-fold improvement for biomolecular analysis.
Area of Science:
- Biophotonics
- Nanotechnology
- Surface Science
Background:
- Conventional microarray chips have limitations in fluorescence yield.
- Development of sensitive and reproducible biomolecular detection platforms is crucial.
Purpose of the Study:
- Introduce a novel universal fluorescence transducer, the evanescent resonator (ER) platform.
- Demonstrate the ER platform's potential for enhanced biomolecular analysis.
Main Methods:
- Fabrication of a transparent substrate with a thin dielectric surface layer containing sub-micron corrugated structures.
- Utilizing interference effects for abnormal reflection geometry to confine excitation energy.
- Leveraging the evanescent field for efficient excitation of surface-bound fluorophores.
Main Results:
- The ER platform exhibits inherent physical signal amplification.
- Achieved over 100-fold increase in fluorescence yield compared to conventional microarray chips.
- Demonstrated superior sensitivity, reproducibility, and ease of use.
Conclusions:
- The evanescent resonator platform offers a significant advancement in fluorescence-based detection.
- The ER chip is versatile for various biomolecular affinity systems, including nucleic acid analysis.
- Compatibility with existing commercial equipment facilitates widespread adoption.