Sweat-Powered Tattoo Sensor

Aug-15-14 Researchers have developed a temporary tattoo sensor that runs on sweat, creating the first biofuel cell able to generate energy from body fluid.

The tattoo sensor was originally developed as a way for athletes to measure their lactate level without needing a blood test. During the testing process, an enzyme on the tattoo sensor gathers electrons from the lactate, creating a small electric current that the team was able to collect and use to power a biobattery. In tests, the device was able to generate 70 microWatts per square centimeter of skin, but the team is working to increase that amount.

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