Flexible Passive near Field Communication Tag for Multigas Sensing

Area of Science:

• Materials Science
• Sensor Technology
• Environmental Monitoring

Background:

• Modified atmosphere packaging (MAP) requires precise gas monitoring.
• Existing gas sensing technologies can be complex and power-intensive.
• A need exists for portable, low-power, and user-friendly gas detection systems.

Purpose of the Study:

• To develop a fully passive, flexible multigas sensing tag for detecting oxygen, carbon dioxide, ammonia, and relative humidity.
• To enable smartphone-based readout for enhanced accessibility and data transmission.
• To validate the sensor's performance for applications in modified atmosphere packaging.

Main Methods:

• Utilized Near Field Communication (NFC) technology for energy harvesting and data transmission.
• Employed optical gas sensors with a common white LED excitation source.
• Developed an Android application for tag power supply and data reception.
• Calibrated sensor responses and evaluated cross-sensitivity.

Main Results:

• Demonstrated a flexible, passive multigas sensing tag readable by smartphones.
• Achieved optical sensor responses calibrated to predict gas concentrations.
• Found negligible or correctable cross-sensitivity among the targeted gases.
• Measured resolutions and limits of detection suitable for MAP applications.

Conclusions:

• The developed NFC-based sensing tag offers a viable, low-power solution for multigas monitoring.
• Smartphone integration provides a convenient platform for real-time environmental analysis.
• The system is well-suited for quality control in modified atmosphere packaging.