Nonenzymatic glucose detection at ordered mesoporous carbon modified electrode

Area of Science:

• Electrochemistry
• Materials Science
• Biosensors

Background:

• Glucose monitoring is crucial for diabetes management.
• Development of sensitive and selective glucose sensors is an ongoing challenge.
• Nonenzymatic glucose sensors offer advantages over enzyme-based counterparts.

Purpose of the Study:

• To develop and characterize a novel nonenzymatic amperometric glucose sensor.
• To evaluate the electrocatalytic activity of ordered mesoporous carbon (OMC) for glucose oxidation.
• To assess the sensor's performance in terms of sensitivity, detection limit, and interference resistance.

Main Methods:

• Fabrication of an electrode modified with ordered mesoporous carbon (OMC).
• Amperometric measurements in alkaline media to evaluate glucose oxidation.
• Electrochemical characterization of the OMC-modified electrode.
• Testing for interference from common biological molecules.

Main Results:

• The OMC-modified electrode exhibited significant electrocatalytic activity towards glucose oxidation.
• The sensor achieved high sensitivity (10.81 µA/mM) and a low detection limit (0.02 mM).
• The sensor demonstrated excellent resistance to common interfering substances like ascorbic acid, dopamine, and uric acid.

Conclusions:

• Ordered mesoporous carbon is a promising material for nonenzymatic glucose sensing.
• The developed OMC-based amperometric sensor offers high performance for glucose determination.
• This sensor shows potential for practical applications in electrochemical biosensing.