Researchers from Korea's KAIST institute used graphene to make metals hundreds of times stronger. The researchers developed a composite graphene-copper material that is 500 times stronger than pure copper and a graphene-nickel one that is 180 times stronger than nickel.

The researchers created a layered structure of graphene and metal. Using CVD they grew a single graphene layer on a metal substrate and then deposited the second metal layer on top. This is the first time such a design has been produced using a single graphene sheet. The researchers explain that the graphene blocks the dislocations and cracks from external damage to travel into the material.