Optimal field-effect transistor operation for high-resolution biochemical measurements

Area of Science:

• Biomedical Engineering
• Materials Science
• Electrical Engineering

Background:

• Field-effect transistors (FETs) are widely used for sensitive detection of biomarkers and gases.
• Existing research primarily focuses on optimizing individual FET device performance.
• Instrumentation commonly used in physics and engineering has been underexplored for FET biosensing applications.

Purpose of the Study:

• To investigate the impact of advanced instrumentation on FET-based biosensor performance.
• To demonstrate the effectiveness of closed-loop proportional-integral-derivative (PID) control for enhancing FET sensor measurements.
• To assess the generalizability of the closed-loop control approach across different FET types.

Main Methods:

• Review of state-of-the-art instrumentation applied to FET sensing.
• Implementation of closed-loop PID control with high-performance dual-gate 2D FETs.
• Extension of the closed-loop control methodology to standard single-gate silicon FETs.

Main Results:

• Closed-loop PID control significantly enhances the sensitivity and resolution of dual-gate 2D FET sensors.
• The closed-loop control strategy is successfully applied to conventional single-gate silicon FETs.
• Demonstrated generalizability of the approach for various existing FET-based sensor platforms.

Conclusions:

• Advanced instrumentation, specifically closed-loop control, offers substantial performance improvements for FET biosensors.
• This approach enhances measurement sensitivity and resolution, applicable to a wide range of FET-based devices.
• The findings pave the way for broader adoption of closed-loop feedback in biosensing applications for optimized performance.