Tiny, self-powered sensor for future hydrogen economy

This is a close-up image of a tiny hydrogen sensor developed by University of Florida engineering researchers. The sensor uses extremely small zinc oxide nanorods, located within the black dots in the triangular base, to gauge the amount of hydrogen in the air. To power the sensor, the researchers designed a novel device that harvests energy from vibrations where the sensor is placed. A tiny wireless transmitter enables the sensor to transmit its results to a central base station.