A team of researchers from Switzerland has recently produced a flexible, rubber-like electronic circuit that stretches to four times the original length in any direction. At the same time, this material also has an extremely high degree of durability. Repeated stretching operations of 4 million times do not destroy or lose electrical conductivity. These features make it ideal for making biosensors and artificial skin, as well as for repairing electronic devices.
This mixed material is made of liquid metal and solid metal alloy. The team first used a high molecular weight silicone compound called polydimethylsiloxane (PDMS) to make a thin film and then formed a double-layered metal structure by evaporating gallium into a sputtering gold film to a thickness of only 60 nanometers . The solid part of the alloy is ruptured when stretched, but liquid gallium (29.8 ° C) rapidly fills the cracks. Best of all, this material can be printed on any surface like normal electronic circuitry.
With no need to print circuits on the board, the development team envisioned a variety of applications. "We could integrate it in traditional electronics to create a stretchable and power-carrying composition and use it on flexible robots and smart clothing ... We can also use it to make actuators to provide tactile Feedback, "team member Arthur Hirsch said. In other words, the electronic device can finally adapt to our soft body or help researchers create lifelike robots.
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