A group of scientists from the University of Tokyo announced the development of a stretchy, rubbery material which conducts electricity. The material consists mostly of SWNT or single wall carbon nanotubes along with elastic resin and an ionic liquid. When the material is attached to a grid of tiny transistors, it can be stretched to more than twice its size (2.34 times, actually) without affecting its conductivity, and yes, it goes back to its original form afterwards.

The group in charge of this project developed a similar material back in 2005, although it can only stretch 1.25 times longer its size. There was another similar material developed before, although its conductivity was limited to 10S/cm while this new material has a conductivity of 57S/cm. According to the paper published by the scientists working on the project, the material could be used to create flexible electronics as well as "arbitrary curved surfaces and movable parts, such as the joints of a robot's arm."