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Valeria Colmena-Rubil1, Julio C Zuaznabar-Gardona2, Xavier Muñoz-Pascual2

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Summary
This summary is machine-generated.

This study presents a novel hybrid electrochemical biosensor for lactate detection in sweat. The wearable sensor utilizes silk fibroin and ionic liquids for enhanced stability and sensitivity, enabling continuous health monitoring.

Keywords:
Ionic liquidKeywords: lactate detectionPrussian blue-based electrodesSilk fibroin filmsSweat analysis

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Area of Science:

  • Biomedical Engineering
  • Materials Science
  • Analytical Chemistry

Background:

  • Wearable biosensors offer non-invasive physiological monitoring but face challenges in stability, specificity, and reliability.
  • Lactate detection in sweat is crucial for metabolic monitoring and health assessment.

Purpose of the Study:

  • To develop a hybrid electrochemical biosensor for accurate and continuous lactate detection in human sweat.
  • To enhance sensor performance using silk fibroin and ionic liquids for improved stability and sensitivity.

Main Methods:

  • Fabrication of a hybrid electrochemical biosensor integrating silk fibroin, ionic liquids, and a Prussian Blue transducer.
  • Engineering a diffusion-modulating top layer to extend the linear range of lactate detection.
  • Validation using artificial and real sweat samples, compared against ion chromatography.

Main Results:

  • The biosensor demonstrated enhanced lactate oxidase stability and catalytic activity.
  • Ionic liquids improved ionic transport, increasing sensor sensitivity and favoring electron transfer.
  • The engineered sensor achieved a wide measurable range (0.5-70 mM) with high sensitivity, linearity, and stable performance, showing >90% recovery in sweat samples.

Conclusions:

  • The developed silk fibroin/ionic liquid (SF/IL) biosensor offers a reliable platform for continuous, non-invasive lactate monitoring in sweat.
  • This versatile scaffold shows potential for multi-analyte detection, enabling comprehensive metabolic profiling for personalized health monitoring.