Highly Flexible and Stretchable Structure Based on Au/Graphene Film and Polyurethane Yarn

Flexibility and stretchability are two key components to be considered in fabricating flexible and stretchable electronic devices. However, most of the current reported flexible and stretchable devices used for wearable electronic devices usually have limited flexibility and stretchability. In this work, a novel flexible structure, which employs Au/graphene film as sheath and polyurethane (PU) yarn as core, is fabricated by a layer-by-layer (LbL) self-assembly method, followed by magnetron sputtering technology. The as-prepared flexible structure demonstrates outstanding flexibility and stretchability which endowed by the core material PU yarn (can be stretched as long as 500%) and superior conductivity which endowed by sheath materials Au/graphene (the resistance reaches to around 5.0 kΩ/cm), showing enormous potential in the development of flexible electronics.