A highly sensitive sensor for carcinoembryonic antigen based on AlGaN/GaN high-electron-mobility transistors

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Cancer Diagnostics

Background:

• Carcinoembryonic antigen (CEA) is a validated serum biomarker for lung cancer.
• Accurate and early detection of lung cancer is crucial for effective treatment.
• Existing diagnostic methods may lack sensitivity, speed, or cost-effectiveness.

Purpose of the Study:

• To develop a simple, label-free method for detecting carcinoembryonic antigen (CEA).
• To utilize AlGaN/GaN high-electron-mobility transistors for enhanced biosensing capabilities.
• To establish a highly sensitive and rapid detection platform for lung cancer biomarkers.

Main Methods:

• Immobilization of CEA antibodies onto the sensing region of AlGaN/GaN high-electron-mobility transistors.
• Fabrication of label-free biosensors for specific CEA recognition.
• Testing the biosensor performance in phosphate buffer solution to determine detection limits.

Main Results:

• The developed biosensor demonstrated label-free detection of CEA.
• High sensitivity was achieved with a detection limit of 1 fg/mL.
• The AlGaN/GaN based biosensor showed specific recognition of CEA.

Conclusions:

• The novel biosensor offers a promising approach for sensitive and rapid CEA detection.
• This technology presents advantages in integration, miniaturization, and cost-effectiveness.
• The developed method has potential for future applications in lung cancer medical diagnostics.