Recycled photocopier paper pyramids send distress signals when you pee on them
If you ever think you’re going to be stranded on a desert island, U.K. researchers may have just the invention for you. Scientists at the University of the West of England have developed paper-based microbial fuel cells activated by urine, which can then power a radio transmitter, Gizmag reported March 19. The bioreactor is made from standard office paper shaped into a pyramid, embedded with latex external waterproofing and coated with dormant biofilms of electricity-generating bacteria. When covered in urine, the device could power a radio transmitter for 35 minutes, and when two fuel cells are connected in a series, the device can transmit radio signals at roughly six-minute intervals for up to 24 hours.
Read more: Gizmag
Images: © Royal Society of Chemistry 2015