Fig. 7: NFC/RFID-based sensors for gas monitoring.
From: NFC/RFID-enabled wearables and implants for biomedical applications
a Construction of NFC tags for semi-quantitative detection of ammonia and explosive gases88. Copyright 2014, NAS. b NFC tag used to detect gases produced by meat spoilage84. Copyright 2018, ACS. c GUI interface on a smartphone displaying detecting results of various gases and humidity in food packaging90. Copyright 2017, ACS. d Smart facemask with integrated flexible NFC tag for wireless CO2 monitoring5. Copyright 2022, Springer Nature. e Structure of a RF-based sensor for respiratory virus detection in forms of aerosol and saliva droplets94. Copyright 2024, Springer Nature. f Mechanism of transduction of electrical signal94. Copyright 2024, Springer Nature
