Silicon based chips rely on oxide and metal layers to connect the transistors. Not clear to me from the article how that would work for graphene based devices.

Silicon based chips rely on oxide and metal layers to connect the transistors. Not clear to me from the article how that would work for graphene based devices. This was also an issue for GaAs based chips. From the Wikipedia article on GaAs "The second major advantage of Si is the existence of a native oxide (silicon dioxide, SiO2), which is used as an insulator"