An Extended-gate Type Organic FET Based Biosensor for Detecting Biogenic Amines in Aqueous Solution

Area of Science:

• Electrochemistry
• Biosensors
• Organic electronics

Background:

• Biogenic amines are crucial indicators in food safety and biological processes.
• Current detection methods can be complex and time-consuming.
• Enzyme-based biosensors offer a promising alternative for rapid detection.

Purpose of the Study:

• To develop and validate a new biosensor for biogenic amine detection.
• To utilize an organic field-effect transistor (OFET) with a modified extended gate electrode.
• To assess the performance of the biosensor for histamine detection.

Main Methods:

• Fabrication of an extended-gate organic field-effect transistor (OFET).
• Modification of the gate electrode with diamine oxidase and a horseradish peroxidase osmium-redox polymer.
• Detection of biogenic amines in an aqueous solution.

Main Results:

• The study reports the first detection of biogenic amines using this OFET device.
• A limit of detection (LOD) of 1.2 μM for histamine was achieved.
• The extended-gate OFET demonstrated high suitability as an enzyme-based biosensor.

Conclusions:

• Extended-gate OFET devices are effective enzyme-based biosensors.
• This technology is suitable for detecting biogenic amine levels.
• The developed biosensor offers a sensitive method for amine detection.