Fig. 2: Characteristic of six F-devices.

a F-RF antenna, Output voltage generated from F-RF antenna with a suppressing resistor demonstrates distance-dependent signal classification. b Ilight/Idark as a function of time of F-photodetector under various input voltage under UV on and off. c Touch output signal as a function of touch duration. d Negative resistance changes as a function of temperature of Cu2O F-temperature sensor. e Amplified (gain ~ 25) heartbeat by F-biosensor module. f Serially connected fibre supercapacitors as power switch of textile lighting/display (on/off).