Robot Builders

Many research teams around the world are building nanodevices of some kind. But these very small devices need very small sources of power to be fully functional. Now, researchers at the University of Illinois at Urbana-Champaign (UIUC) have shown that a single nanowire can produce power by harvesting mechanical energy from its environment. ‘Made of piezoelectric material, the nanowire generates a voltage when mechanically deformed.’ But don’t think that this nanowire, made of an oxide of barium and titanium, and measuring approximately 280 nanometers in diameter and 15 microns long, will be able to power anything more than a nanoscale sensor. It was able to generate an electrical energy of about 0.3 attojoules — less than one quintillionth of a joule or about 2.8E-25 kilowatt-hour.