▎ 摘　　要

In this paper, low-voltage, large-strain flexible electrothermal actuators (ETAs) based on laserreduced graphene oxide (LRGO)/Ag particle composites were fabricated in a simple and costefficient process. By adding Ag particles to the LRGO, the sheet resistance decreased effectively. Under a driving voltage of 28 V, the actuator obtained a bending angle of 192 degrees within 6 s. Besides, the bending deformation could be precisely controlled by the driving voltage ranging from 10 degrees to 192 degrees. Finally, a gripper composed of two actuators was demonstrated to manipulate a piece of polydimethylsiloxane block. With the advantages of low-voltage, fast-response, and easy-to-manufacture, the graphene based ETAs have a promising application in soft robotics and soft machines. Published by AIP Publishing.