Point-of-Care Diabetes Diagnostics: Towards a Self-Powered Sensor
Inês Vinagre1, Gabriela V Martins1, Joaquim A Alves1
1CIETI-LabRISE, School of Engineering, Polytechnic Institute of Porto, 4200-072 Porto, Portugal.
Micromachines
|March 6, 2025
Summary
A novel biosensor uses an enzymatic fuel cell (EFC) for rapid blood glucose monitoring, offering a breakthrough for diabetes management. This miniaturized device enables quick, on-site diagnosis, paving the way for advanced point-of-care diagnostics.
Area of Science:
- Biomedical Engineering
- Electrochemistry
- Biosensors
Background:
- Diabetes management requires frequent blood glucose monitoring.
- Existing methods can be invasive or time-consuming.
- Need for rapid, accurate, and accessible diagnostic tools.
Purpose of the Study:
- To develop a miniaturized, membraneless enzymatic fuel cell (EFC) biosensor for blood glucose monitoring.
- To enable rapid, on-site diabetes diagnosis.
- To advance point-of-care (PoC) diagnostic capabilities.
Main Methods:
- Utilized disposable screen-printed gold electrodes (Au-SPE) modified with glucose oxidase (GOx).
- Engineered anode with a biographene layer and cathode with graphene oxide/Prussian blue nanocubes (GO/PBNCs).
- Integrated electrodes into an EFC for glucose oxidation detection.
Main Results:
- Demonstrated effective glucose oxidation at both anode and cathode.
- Achieved an output power of approximately 1.8 μW/cm² at 5 mmol/L glucose concentration.
- Results align with physiological blood glucose ranges (3.8–6.9 mmol/L).
Conclusions:
- The developed EFC biosensor offers a promising solution for efficient blood glucose monitoring.
- This technology represents a significant advance in autonomous, point-of-care diagnostic devices.
- Paves the way for widespread, accessible diagnostics for various analytes.
