Tiny Stanford invention purifies water in minutes using the sun
Is that a piece of bark in your drink? A bug, maybe? Nope. It’s a tiny water-purifying tablet powered by the sun.
The device comes from scientists at the Department of Energy’s SLAC National Accelerator Laboratory and Stanford University’s Institute for Materials and Energy Science. It measures 1 centimeter by 2 centimeters, about the size of half a postage stamp, and decontaminates water fast using a readily available resource — visible light from the sun’s rays.
The invention could let hikers (and later, people living in developing countries) clean their water quickly without resorting to other power-fueled methods, such as the tried-and-true tactic of boiling water, or an ultraviolet wand, which requires charging.
Other devices harness the sun’s rays to decontaminate water, but only use UV light, which typically takes anywhere from several hours to two days to work, according to the Swiss Federal Institute of Aquatic Sciences and Technology’s Solar Water Disinfection initiative. The Stanford tablet, on the other hand, takes minutes.
Read full story: CNET