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SPR biosensing coupled to a digital microfluidic microstreaming system.

Elisabeth Galopin1, Maxime Beaugeois, Bernard Pinchemel

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Summary
This summary is machine-generated.

This study introduces a novel droplet-based Surface Plasmon Resonance (SPR) system enhanced by Surface Acoustic Wave (SAW) microfluidics. This integration improves analyte transport, enabling more accurate kinetic analysis and reliable quantification in biosensing.

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Area of Science:

  • Analytical Chemistry
  • Biotechnology
  • Microfluidics

Background:

  • Surface Plasmon Resonance (SPR) biosensing is crucial for analyzing molecular interactions.
  • Analyte transport to the sensing surface significantly impacts SPR accuracy.
  • Achieving reliable equilibrium for quantification in flow cells remains challenging.

Purpose of the Study:

  • To develop and evaluate a droplet-based SPR system integrated with Surface Acoustic Wave (SAW) microfluidics.
  • To address limitations in analyte transport and improve quantification in SPR biosensing.
  • To enhance the accuracy of kinetic parameter estimation in mass transport-limited conditions.

Main Methods:

  • Integration of a droplet-based SPR system with a SAW microfluidic platform.
  • Utilizing SAW-induced microstreaming to control analyte transport.
  • Monitoring streptavidin binding in both static and SAW streaming modes.

Main Results:

  • SAW microstreaming effectively improved analyte delivery to the SPR sensing surface.
  • Enhanced kinetic parameter estimation was observed under SAW streaming conditions.
  • Reliable quantification was demonstrated through improved mass transport control.

Conclusions:

  • The coupled SPR-SAW system offers a promising approach to overcome mass transport limitations in biosensing.
  • SAW microfluidics significantly enhances the performance of droplet-based SPR for kinetic and quantitative analyses.
  • This integrated platform holds potential for advanced biomolecular interaction studies.