Self-Powered Glucose Sensing with Cu-BDC/rGO Heterostructure: Ultra-Selective, Highly Sensitive, and IoT-Enabled...

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Flexible, wearable glucose sensors are crucial for continuous glucose monitoring.
• Long-term operation necessitates integrated self-powered functionality for wearable devices.

Purpose of the Study:

• To develop a multifunctional nanocomposite for self-powered wearable glucose sensing.
• To investigate the synergistic properties of Cu-BDC and rGO for enhanced performance.
• To demonstrate a proof-of-concept device for real-time, autonomous glucose monitoring.

Main Methods:

• Synthesis of a Cu-BDC/rGO nanocomposite.
• Electrochemical characterization for nonenzymatic glucose sensing.
• Supercapacitive performance evaluation.
• Fabrication of a self-powered wearable device prototype.

Main Results:

• The Cu-BDC/rGO nanocomposite exhibited high sensitivity (7379.8 μA mM⁻¹ cm⁻²) and a low detection limit (0.49 μM) for glucose.
• Excellent supercapacitive behavior was achieved with a specific capacitance of 336 F g⁻¹ and high cycle stability.
• A functional self-powered wearable device demonstrated real-time sweat glucose monitoring and wireless data transmission.

Conclusions:

• The multifunctional Cu-BDC/rGO nanocomposite shows significant potential for next-generation biosensing platforms.
• Integrated energy harvesting, storage, and sensing capabilities are enabled by this nanostructure.
• This work paves the way for autonomous, IoT-enabled personalized digital healthcare systems.