Development of a Sensitive Self-Powered Glucose Biosensor Based on an Enzymatic Biofuel Cell

Area of Science:

• Biosensors and Biofuel Cells
• Enzyme Immobilization Techniques
• Nanomaterials in Electrochemistry

Background:

• Biofuel cells offer enzyme-specific sensing without external power.
• Developing self-powered biosensors is crucial for portable diagnostics and monitoring.
• Enzyme immobilization on nanostructured electrodes enhances sensor performance.

Purpose of the Study:

• To design and develop a self-powered glucose sensor utilizing a biofuel cell.
• To leverage multi-enzyme cascades and nanocarbon materials for improved glucose detection.
• To create a robust and sensitive biosensor suitable for real-world applications.

Main Methods:

• Immobilization of redox enzymes (NAD-GDH, GOx, HRP) on MWCNT and rGO engineered electrodes.
• Utilizing glucose as the substrate for both anode and cathode reactions.
• Incorporating polymers to enhance biocatalyst immobilization and sensor stability.

Main Results:

• A self-powered glucose sensor based on a biofuel cell was successfully designed.
• The sensor operates effectively under air-saturating conditions without gas purging.
• The combination of nanostructures and multi-enzyme cascade achieved high sensitivity.

Conclusions:

• The developed biofuel cell glucose sensor demonstrates reliable detection in the 0.1-7.0 mM range.
• The sensor design is suitable for analyzing glucose in biofluids and industrial food samples.
• This work highlights the potential of enzyme-based biofuel cells for practical sensing applications.