Artificial muscle can power your Ipod

BOFFINS IN CALIFORNIA have developed a self-repairing artificial muscle that can generate enough electricity to charge an Ipod.

The top boffin in charge of the research, a scientist at the University of California, Los Angeles, named Qibing Pei, told the Discovery Channel that the artificial muscle was made up of flexible carbon nanotubes, which acted as electrodes. This is quite an improvement on previous artificial muscle models which tended to be metal based and have frequent failure rates with reuse. Pei reckons: "We've made an artificial muscle that, when you apply electricity to it, expands more than 200 percent”.

The way it works, is that as the artificial muscle material contracts after expanding, the carbon nanotubes rearrange themselves, causing a small electric current to generate, which can then be captured and stored in a battery.

It is also robust. If any part of the carbon nanotube packs up, the area around it seals itself off by becoming non-conductive, thereby stopping the defect from affecting other areas. The clever muscle is also eco friendly and energy efficient, conserving up to 70 per cent of energy pumped into it. Some boffins have suggested that it could even be used to capture wind or wave energy in the future to charge electrical devices.

The research could also lead to the creation of moving robots, better prosthetics, and battery charging energy sources. A self-repairing Ipod would be nice.