Slashdot Mirror
Stretchy Wires to Create Artificial Nerves
Roland Piquepaille writes "Researchers from the Johns Hopkins University have built electronic circuits which exhibit a rubbery behavior. The flexible circuits, built by using gold springs, can stretch like rubber. And Nature says that these stretchy wires can be used to create artificial nerves bending inside our bodies or wearable electronics. 'Wiring like this could be woven into stretchy sports clothing and used to connect up sensors that monitor athletic performance. Rubbery electrodes made from biocompatible materials might be attached to a beating heart and used to sense impending problems.' This overview contains more details and references about these flexible wires."
We've had them for many years. It's called NiTiNOL. Nitinol is a metal alloy that, when used in wires, constricts when current is passed through it (heating phase) and stretches when it is idle (cooling phase). This is also the same material that those bend-proof wire glasses frames are made of. See http://www.dynalloy.com/AboutNitinol.html for just one manufacturer's info page.
Actually, cephalopod nerves aren't that amazing. They're no faster that than the nerves in your body. It's just that cephalopods never developed myelinated nerves. Myselin insulates the nerve and allows for much faster signal propogation. The large size of cephalopod nerves is simply an alternate way to get higher transmission speeds.
Either way, nerves only transmit at a few hundred miles an hour. Even assuming these flex wires aren't as conductive as a bulk gold wire, you're still looking at a transmission speed at a significant fraction of c.
Silicon and metal wiring operates at speeds millions of times higher than biological nervous systems.