Somatosensory actuator based on stretchable conductive photothermally responsive hydrogel. - Yusen Zhao; Chiao-Yueh Lo; Lecheng Ruan; Chen-Huan Pi; Cheolgyu Kim; Yousif Alsaid; Imri Frenkel; Rossana Rico; Tsu-Chin Tsao; Ximin He (Sci. Robotics, 2021)