Fig. 4: Stretchable NFC/RFID-based strain sensor.
From: NFC/RFID-enabled wearables and implants for biomedical applications

a The wireless Ti3C2Tx MXene strain sensor59. Copyright 2020, ACS. b A wireless sensing system with embroidered NFC and rGO/wool-knitted strain sensor60. Copyright 2020, ACS. c A near-field multi-body area network integrated into textiles61. Copyright 2021, Springer Nature. d Battery-free sensor networks based on near-field-enabled clothing62. Copyright 2020, Springer Nature. e Photograph of a RFID sensor node for sensing the pulse on a human wrist38. Copyright 2019, Springer Nature. f Photograph of a person wearing multiple strain sensors38. Copyright 2019, Springer Nature. g The total system of RFID tag sensor incorporating a flexible diode63. Copyright 2021, Springer Nature