The invention discloses super-clean
graphene and a preparation method thereof. The preparation method of the super-clean
graphene comprises the following steps: putting foam
copper on a
copper substrate, and attaching; leading
carbon source gas and
hydrogen to perform
chemical vapor deposition; after deposition is completed, obtaining the super-clean
graphene at the contact surface of the
copper substrate and the foam copper. The preparation method has the advantages that the preparation method is simple and is suitable for large-scale production, the continuous clean area reaches the sub-
centimeter level, and the preparation method is suitable for the fields of
electronics,
optics and the like.