It is the thinnest material ever made. You would need to stack three million graphene sheets on top of each other to get a pile one milimetre high. It is also the strongest substance known to mankind — 200 times stronger than steel and several times tougher than diamond.
A sheet of graphene as thin as clingfilm could hold the weight of an elephant. In fact, according to one calculation, an elephant would need to balance precariously on the end of a pencil to break through that same sheet.
Despite its strength, it is extremely flexible and can be stretched by 20 per cent without any damage.
It is made from abundantly found "Graphite" and formed into a honeycomb nano structure, and the base material is relatively cheap...