Figure 1. Temperature-induced reversible transitional insulator and conductor (TIC) based on the liquid metal polymer. a) The TIC becomes conductive(R = 0.05 Ω) after freezing by liquid nitrogen and LED is turned on, and recovers to electrical insulative (R > 2 × 108 Ω) again after warming, the scalebar is 2 cm. b) The resistivity of TIC as a function of the temperature. c) Resistance change between electrical insulative and conductive for 100 cyclesunder the temperature regulation. d) The phase change of LM droplets in response to freezing and warming along with volume change, the scale baris 2 mm. e) A schematic illustration of mechanism in electrical transition between insulative and conductive of TIC in response to temperature change.