▎ 摘　　要

NOVELTY - Photothermal responsive material comprises two-layer film type composite material, one layer is a reduced graphene oxide/gold nano-rod composite film, and the other layer is a polymer film, where in the reduced graphene oxide/gold nano-rod composite film, the mass ratio of the reduced graphene oxide to the gold nano-rod is 3.25:1-8.12:1, and the film thickness is 1-2 mu m. The polymer film material is polymethyl methacrylate (PMMA) and has a film thickness of 10-50 mu m. USE - The material is useful for preparing photothermally driving robot (claimed). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing photothermally driving robot using photothermal responsive material, comprising (i) mixing graphene oxide solution and gold nano-rod solution in a volume ratio of 10:1-20:1, stirring at a speed 300-800 rotations/minute for 10-15 minutes to obtain solution of graphene oxide and the gold nano-rod composite nano material, where the concentration of the graphene oxide solution is 4-8 mg/ml, and the concentration of the gold nano-rod solution is 0.1-0.5 mM, spin-coating the solution of the composite nano-material on the polymethyl methacrylate film to form an upper composite film, where the thickness of the composite film is 1-2 mu m, and the thickness of the lower polymethyl methacrylate film is 10-50 mu m, baking at 50-70 degrees C for 5-6 hours to obtain two-layer film of composite film-polymethyl methacrylate, i.e. a photothermal responsive material precursor, where the diameter ratio of the gold nano-rods in the gold nano-rod solution is 0.25-1, (ii) attaching the two-layer film to the light carving platform by electrostatic adsorption flat, and fixing the ends by tape, imporing the patterned picture of the designed robot structure into the optical drive control software Nero StartSmartEssential, scanning the optical drive region of the double-layer film by the laser according to the imported pattern to complete the photo-relief reduction to prepare the photothermal response material, finally, the light-cut double-layer film is a patterned film corresponding to the robot structure, where the patterned lines and regions on the film are light-engraved graphene oxide-gold nano-rod composite regions, (iii) lifting the double-layer film after the light carving reduction from the light carving platform, and according to the specific structure of the robot, cutting the inner and outer contour lines of the light carving pattern, according to the specific application needs, and giving a certain bending angle of the optical drive area of the robot 0-10 degrees .