Andre Geim and Konstantin Novoselov (who won the 2010 Nobel prize in Physics for discovering Graphene) have now developed a new material called Fluorographene - it is as strong as Graphene but does not conduct electricity at all. The group placed a fluorine atom at every single carbon atom, thereby destroying the electron cloud and preventing electricity from flowing under normal conditions, but not impinging on the structural integrity of the carbon framework.

They say that the properties of the new material are very similar to Teflon, and in fact they call it "2D Teflon".