IGZO thin-film transistor biosensor array for highly sensitive detection of β2-microglobulin

Area of Science:

• Biomedical Engineering
• Materials Science
• Analytical Chemistry

Background:

• Beta-2-microglobulin (β2-MG) is a crucial biomarker for chronic kidney disease (CKD).
• Conventional detection methods (RIA, ELISA) for β2-MG are often complex, slow, and lack sensitivity.
• Biosensors offer a promising alternative for rapid and sensitive biomarker detection.

Purpose of the Study:

• To develop and characterize a highly sensitive biosensor for β2-MG detection.
• To explore the potential of indium gallium zinc oxide (IGZO) thin-film transistors (TFTs) in biosensing applications.
• To provide a viable alternative to traditional diagnostic methods for CKD indicators.

Main Methods:

• Fabrication of a 4 × 4 biosensor array utilizing indium gallium zinc oxide (IGZO) thin-film transistors (TFTs).
• Characterization of the biosensor's performance for β2-MG detection.
• Evaluation of sensitivity, consistency, and detection limit.

Main Results:

• The IGZO-based biosensor array demonstrated high sensitivity to β2-MG.
• Achieved a low limit of detection for β2-MG at 1.2 × 10^-4 μg mL^-1.
• The biosensor exhibited excellent consistency and practical application potential.

Conclusions:

• The developed IGZO TFT biosensor array is a sensitive and reliable tool for β2-MG detection.
• This technology holds significant promise for improved diagnostics of chronic kidney disease.
• The study highlights the potential of IGZO TFTs for advanced biosensing platforms.