Fig. 4: Self-healing and recovery of electronic gels.
From: Self-healable stretchable printed electronic cryogels for in-vivo plant monitoring
a Image of a spring-shaped electronic cryogel (prepared with a freezing time of 30 min) connected to a source meter. The electrical resistance was originally 9 kΩ, the sample was then cut and separated, and placed back together. After 15 min, the electrical resistance of the sensor recovered to 13 kΩ. b Photograph of a self-healed cryogel c Stress-strain curves of uncut (reference) and cut electronic cryogels under taken after 4 h, 24 h, and 48 h healing time. d. Electrical resistance ratio of the spring-shaped electronic cryogel: uncut (reference) and cut under varying strain applied after 4 h, 24 h, 48 h of healing time.
