Master transduction curve for field-structured chemiresistor calibration

Area of Science:

• Materials Science
• Chemical Engineering
• Sensor Technology

Background:

• Chemiresistors detect volatile organic compounds (VOCs) using conducting polymer composites.
• Sensor response depends on analyte-polymer interactions and internal stress.
• Individual sensor calibration for each analyte is time-consuming and costly.

Purpose of the Study:

• To introduce a universal master transduction curve for chemiresistor calibration.
• To demonstrate that sensor response is solely dependent on polymer swelling.
• To simplify the calibration process and enable prediction of responses to various analytes.

Main Methods:

• Developed a master transduction curve based on polymer swelling.
• Utilized polymer mass-sorption isotherms for calibration data.
• Employed a single analyte to calibrate sensors and predict responses to others.

Main Results:

• The master transduction curve is independent of the analyte's chemical nature.
• Sensor calibration requires only polymer sorption data.
• A single calibrated sensor can predict responses to other analytes and determine new sorption data.

Conclusions:

• The master transduction curve significantly streamlines chemiresistor calibration.
• This method reduces the cost and effort associated with sensor characterization.
• The findings enable versatile sensor applications and material property determination.