Portable and visual electrochemical sensor based on the bipolar light emitting diode electrode

Area of Science:

• Electrochemistry
• Biosensing
• Materials Science

Background:

• Traditional sensing methods often require expensive reagents and instruments.
• There is a need for rapid, high-throughput, and cost-effective analytical techniques.

Purpose of the Study:

• To develop a novel sensing strategy utilizing a closed bipolar system and light-emitting diodes (LEDs).
• To create a bipolar electrode array for naked-eye determination of electroactive substances.
• To demonstrate the system's capability for rapid quantification of various analytes.

Main Methods:

• A closed bipolar system was designed, connecting a split bipolar electrode (BPE) with an LED.
• The BPE array was utilized for detecting electroactive substances through luminescent signals.
• The luminous intensity of the LED correlated with sample concentration.

Main Results:

• A novel bipolar LED electrode (BP-LED-E) was successfully constructed.
• The system achieved ultrahigh current efficiency, enabling sensitive detection.
• Rapid quantification of hydrogen peroxide (H2O2), ascorbic acid (AA), glucose, and blood sugar was demonstrated.

Conclusions:

• The developed BP-LED-E offers a cost-effective and efficient sensing platform.
• The system provides a stable and visually detectable signal for analyte quantification.
• This novel strategy holds promise for high-throughput analysis in various applications.