An Electrochemical Amperometric Ethylene Sensor with Solid Polymer Electrolyte Based on Ionic Liquid

Area of Science:

• Electrochemistry
• Materials Science
• Sensor Technology

Background:

• Electrochemical sensors offer sensitive gas detection.
• Solid polymer electrolytes (SPEs) provide a stable medium for electrochemical devices.
• Ionic liquids integrated into SPEs can enhance sensor performance.

Purpose of the Study:

• To develop and characterize an electrochemical amperometric ethylene sensor.
• To investigate the use of aerosol-jet printing for sensor fabrication.
• To explore the relationship between SPE/WE interface morphology and sensor performance.

Main Methods:

• Fabrication of a three-electrode sensor system with a custom SPE.
• Deposition of a gold working electrode onto the SPE using aerosol-jet printing.
• Electrochemical detection of gaseous ethylene via oxidation at 800 mV.

Main Results:

• The sensor exhibited measurable sensitivity, response/recovery times, and repeatability.
• Analysis revealed correlations between the SPE/WE interface's microstructure and sensor parameters.
• The aerosol-jet printing technique proved effective for creating the electrochemical interface.

Conclusions:

• The developed sensor successfully detects ethylene using a novel SPE and printing method.
• Additive printing techniques show promise for scalable manufacturing of electrochemical gas sensors.
• The study validates the potential of polymer electrolytes in printed sensor applications.