Material solutions for stretchable soft electronics

In this presentation, I would like to share my three material solutions to realize highly stretchable and mechanically robust stretchable electronic systems. First, I will show the design strategy for highly tough and stretchable polymeric materials with autonomous self-healing properties, which can be used as stretchable substrates. My stretchable substrates realize exceptional mechanical properties such as notch-insensitive high stretchability, high toughness of 12,000 J/m2, and autonomous self-healing even in aquatic environments. Second, I will talk about the tough interfacing layer to stabilize the stretchable electronics systems under dynamic deformations. With a tough interfacing layer, I could successfully stabilize stretchable electronic systems even with non-stretchable electronic components. Finally, I will show a new class of elastic conductors based on liquid metal particles, which can be used as strain-insensitive electrical interconnections for elastic printed circuit boards. With new materials, for the first time, I successfully realized highly stretchable and mechanically tough stand-alone stretchable electronics. Through my presentation, I will cover from the design of new functional soft materials to their applications in soft electronics.