Scientists build graphene sensor that powers itself from wiring's magnetic fields

Researchers at the University of Arkansas and the University of Michigan have developed a graphene energy harvester that powers an ultra-low-power temperature sensor without a battery. The device draws nanowatts from magnetic fields around 60 Hz AC wiring, charging capacitors that can keep it running for at least 24 hours.

• Sensor consumes nanowatts of power and needs no battery
• Graphene inductor harvests energy from 60 Hz wiring fields
• Charged capacitors hold at least 24 hours of reserve power
• NTS Innovations holds the exclusive commercialization license