Researchers have developed a semiconducting ink, that consists of carbon nanotubes capable of holding electrical charge. This ultimately means that small circuits could be printed straight onto… well anything I suppose. These electronic circuits could be implemented on products in shops to allow wireless walk-through checkouts. This idea is not a new one at all and is called RFID checkout, it is all ready used in a couple of stores throughout the world, but you may be able to see it being used more often now its cheap enough to be used.
