Look, we talk a lot about Season 4 of Game of Thrones, but you should know  this:

Graphene is pure carbon in the form of a very thin, nearly transparent sheet, basically one atom thick. It is remarkably strong for its very low weight (100 times stronger than steel) and it conducts heat and electricity with great efficiency. While scientists had theorized about graphene for decades, it was first produced in the lab in 2004.Because it is virtually two-dimensional, it interacts oddly with light and with other materials. Researchers have identified the bipolar transistor effect, ballistic transport of charges and large quantum oscillations.