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Keywords:

  • bendingstretching actuators;
  • polymers;
  • shape–memory materials;
  • soft materials;
  • polymerization
Thumbnail image of graphical abstract

A redhead: Surface-grafted hydrophilic polymer brushes (see picture) with high molecular weight and graft density caused reversible bending and stretching of soft polymeric substrates on a macroscale. The shape change of the substrate was tuned to respond to different stimuli including humidity, temperature, and pH.