A Micro Electrochemical Sensor for Multi-Analyte Detection Based on Oxygenated Graphene Modified Screen-Printed...

Area of Science:

• Electrochemistry
• Materials Science
• Biosensors

Background:

• Electrode biofouling hinders electrochemical sensor performance in biological fluids.
• Graphene oxide (GO) offers tunable properties like hydrophilicity and functional groups for improved electrocatalysis.
• Developing robust electrode interfaces is crucial for practical biosensor applications.

Purpose of the Study:

• To design and evaluate a micro electrochemical sensor with enhanced anti-biofouling and electrocatalytic capabilities.
• To utilize graphene oxide (GO) for tuning electrode surface properties.
• To achieve selective multi-analyte detection in biological samples.

Main Methods:

• Fabrication of a micro electrochemical sensor using a GO-modified screen-printed electrode and PDMS micro-cell.
• Electrochemical tuning of GO's oxygen-containing functional species to modify hydrophilicity/hydrophobicity and conductivity.
• Investigation of protein-electrode interactions and uric acid analysis.

Main Results:

• The GO-modified electrode exhibited excellent selectivity and anti-biofouling properties.
• Electrochemical tuning effectively modulated surface characteristics for improved performance.
• Demonstrated potential for analyzing biological samples prone to biofouling.

Conclusions:

• Electrochemical modification of GO-based electrodes is a viable strategy for creating advanced nonenzymatic biosensors.
• The developed sensor shows promise for reliable analysis in complex biological environments.
• The study highlights the importance of interface engineering for biosensor development.