Invisible nanoparticle barcodes could help law enforcement catch criminals

The long arm of the law has the added advantage of technology working alongside them in order to uncover dastardly crimes that have been committed by nefarious minds. However, there are moments when even the law remains one step behind, and in this particular game of cat and mouse, perhaps the introduction of an invisible barcodemight be able to work in the favor of the authorities as it can be used to track the likes of explosives, medicines and bank notes. A team that hails from the Worcester Polytechnic Institute in the US discovered that selected nanoparticles do feature special characteristics that are able to mark different items.