Flexible and wearable graphene/polypyrrole fibers towards multifunctional actuator applications

• Graphene fiber/polypyrrole (GF/PPy) actuators are fabricated in a simple method.
• The GF/PPy actuator shows high flexibility and durability.
• Multi-shaped actuations and multi-armed tweezers can be facilely obtained.
• A prototype net actuator is demonstrated by weaving fiber actuators into a network.

Novel electrochemical fiber actuators based on graphene fiber/polypyrrole (GF/PPy) asymmetric structures have been prepared by a facile controlled electropolymerization of pyrrole (Py) on the GF. The fiber actuator is of high flexibility and durability, and can be further devised to fabricate multi-armed tweezers and net actuators.