A novel non-enzymatic glucose sensor based on Cu nanoparticle modified graphene sheets electrode

Area of Science:

• Electrochemistry
• Materials Science
• Nanotechnology

Background:

• Development of sensitive and stable glucose sensors is crucial for diabetes management.
• Non-enzymatic glucose sensors offer advantages over enzyme-based systems, but often face challenges with sensitivity, stability, and interference.

Purpose of the Study:

• To develop a novel, stable, and sensitive non-enzymatic glucose sensor.
• To investigate the electrochemical performance of copper nanoparticles decorated on graphene sheets for glucose detection.

Main Methods:

• Potentiostatic electrodeposition of metallic copper nanoparticles on graphene sheets.
• Electrochemical characterization using cyclic voltammetry and chronamperometry.
• Evaluation of sensor performance including linear range, detection limit, response time, stability, and selectivity.

Main Results:

• The Cu-graphene sheets electrode exhibited a synergistic effect, enhancing glucose oxidation.
• Achieved a wide linear range up to 4.5 mM with a low detection limit of 0.5 μM.
• Demonstrated rapid response time (<2s), high stability, and excellent selectivity, effectively avoiding common interferences.

Conclusions:

• The developed Cu-graphene sheets electrode is a highly selective, sensitive, stable, and fast non-enzymatic glucose sensor.
• This sensor shows significant promise for practical applications in amperometric glucose sensing.