Fig. 3: Operation of various electronic devices on the rollable platform.

a Photographic and thermal images of the heater in its unrolled and rolled states. Thermal images of the heater show the temperature distribution when currents are applied. b Photographic images of the temperature and strain sensor in their unrolled and rolled states. c, d Measurements of the resistance change of the temperature sensor with the variation in temperature in its rolled and unrolled states. e The graph of normalized resistance variance of the strain sensor with an applied strain of 2%. f Measurements of the resistance change of the strain sensor in its rolled and unrolled states