Graphene is a kind of sp-based graphene? Hybrid carbon atoms are closely packed into a single-layer two-dimensional honeycomb lattice structure.
Study history
In fact, graphene originally exists in nature, but the single-layer structure is difficult to peel off. Graphene is stacked layer by layer to form graphite. Graphite with a thickness of 1 mm contains about 3 million layers of graphene. When a pencil is lightly scratched on paper, it may leave several layers or even just one layer of graphene.
In 2004, Andre Geim and Constantino Vaksholov, two scientists from the University of Manchester in England, discovered that they could obtain thinner and thinner graphite flakes in a very simple way.
They stripped the graphite sheet from the highly oriented pyrolytic graphite, and then stuck both sides of the graphite sheet on a special tape. By tearing the tape, the graphite sheet was divided into two parts, and the sheet became thinner and thinner as the operation continued. Finally, they got a thin sheet composed of only one layer of carbon atoms, which is graphene.
Both of them won the Nobel Prize in Physics in 20 10. The common methods of graphene powder production include mechanical stripping, redox and SiC epitaxial growth, and the film production method is chemical vapor deposition.