Innovative Manufacturing Method Showing Potential of Scalable Graphene Electronics
Published By : 12 Feb 2015 | Published By : QYRESEARCH
When people talk about the advantages of graphene, they generally are referring to the single crystal form of graphene which does have many attractive properties such as high electron mobility. However, creating a single crystal, pure graphene needs an unscalable technique called the Scotch Tape method, and graphene is pulled out in a single layer flakes which is directly from bulk graphite.
The process of chemical vapor deposition or CVD has set a bridge between the purity and scalability in the production of graphene. This technique allows graphene to be grown on the surface of a metal substrate such as nickel or copper.
However, since the graphene gets eventually peeled off from the metal substrate, it can either be completely contaminated or ruined. But, researchers in Netherlands at the University of Groningen have created a production technique based on the CVD process which eliminates the potential for contamination or ruin at the same time maintaining scalability. This is based on something which was discovered while they were analyzing chemical vapor deposition grown graphene around three year back.
According to one of the researchers, they analyzed a sample of graphene with copper which led to certain strange observations. These researchers observed that certain copper oxide amount was present next to the used copper. The graphene which was formed was a kind of film on top of the copper oxide. However, since oxidized metals are generally used for passivation of electronics process wherein the light coat of an oxide is applied to produce a shell against the corrosion. The researchers did suspect that this copper oxide layer might leave the properties of graphene untouched.