Magneto‐Orientation of Magnetic Double Stacks for Patterned Anisotropic Hydrogels with Multiple Responses and Modulable Motions

Reported here is a multi-response anisotropic poly(N-isopropylacrylamide) hydrogel developed by using rotating magnetic field to align double stacks (MDSs) that are fixed polymerization. The magneto-orientation of MDSs originates from the unique structure with γ-Fe2O3 nanoparticles sandwiched two silicate nanosheets. resultant gels not only exhibit optical and mechanical properties but also show responses temperature light. Gels complex ordered structures further devised multi-step orientation photolithographic These varied birefringence patterns potentials as information materials, can deform into specific configurations upon stimulations. Multi-gait motions realized in patterned gel through dynamic deformation under spatiotemporal light friction regulation imposed force. assisted fabrication hydrogels additional functions should bring opportunities for materials biomedical devices, soft actuators/robots, etc.