The prototype nanogenerator provides continuous direct-currentelectricity by harvesting mechanical energy from such environmentalsources as ultrasonic waves, mechanical vibration or blood flow.Providing power for nanometer-scale devices has long been a challenge.Batteries and other traditional sources are too large, and tend tonegate the size advantages of nanodevices. And since batteries containtoxic materials such as lithium and cadmium, they cannot be implantedinto the body as part of biomedical applications. Because thenanogenerator is non-toxic and compatible with the body, the newnanogenerators could be integrated into implantable biomedical devicesto wirelessly measure blood flow and blood pressure within the body.This device could be in your shoes for example and when you walk youcould generate your own small current to power small electronics.Anything that makes the nanowires move within the generator can be usedfor generating power.

Source: gizmag.comAdded: 10 August 2007