Edible graphene could embed RFID tags in food

Graphene is extremely thin and strong, a great conductor of heat and electricity, is antibacterial and can even hunt down cancer – and now you can have your wonder material and eat it, too. The lab of James Tour at Rice University has demonstrated a way to etch graphene onto food like bread and potatoes, as well as materials like cardboard and cloth, where it could then act as an RFID tag. Along with materials like cardboard, paper, cloth, cork and coal, the team found the technique could work with food like bread, potatoes, and coconuts. The key seems to be an organic polymer known as lignin, which is present in all those materials and is also what allowed dried wood to form graphene.