Cardiac Power Generator

Researchers at the University of Illinois have developed a stamp-sized patch that can turn muscle movement into electricity. The technology could eventually eliminate the need for batteries in implantable devices like pacemakers, neural stimulators and glucose monitors.

The patch consists of a lead zirconate titanate nanoribbon mounted on a plastic substrate. When sewn to an organ inside the body – such as the heart or diaphragm – muscle movement causes the nanoribbon to bend and stretch, producing an electric current. A microbattery, also mounted on the substrate, stores the power being generated. In recent animal testing, the patch was capable of storing up to 8 volts of electricity, which is adequate to provide power for certain commonly used biomedical implants. The next step is to begin long-term testing in animals.