Graphene oxide composite fibers muscle in

Soft materials promise more dexterous, sensitive robotics but soft actuators are limited in strength and power density. Now researchers at the University of Pennsylvania have fabricated meter-long composite fibers combining graphene oxide (GO) nanosheets with flexible, conductive polymers that can achieve mechanical strength, toughness, and actuation that surpasses biological muscles [Gao et al., Materials Today (2023),