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a) Volumetric shrinking and swelling properties of the RT-PEDOT:PSS hydrogels under mild dehydration (N=3); (b) Application of the swellable RT-PEDOT:PSS hydrogel as a water-controllable switch for LED; (c) Optical images of the healing processes of a damaged RT-PEDOT:PSS hydrogel, and SEM images of the healed region; (d) Mechanical healing of the RT-PEDOT:PSS hydrogel by placing two separated RT-PEDOT:PSS hydrogels (mildly dehydrated) together for 5 min.
