Graphene is one of the forms of carbon. Like diamonds and graphite, the forms (or 'allotropes') of carbon have different crystal structures, and this gives them different properties. Graphene is the basic 2D (two dimensional) form of a number of 3D allotropes, such as graphite, charcoal, fullerene and carbon nanotubes.
The term graphene was coined as a combination of graphite and the suffix '-ene' by Hanns-Peter Boehm, who described single-layer carbon foils in 1962. Graphene is like a honeycomb or 'chicken wire' structure, made of carbon atoms and their bonds. Graphite is many graphene sheets stacked together.
Graphene oxide[change | change source]
An international team from the University of Manchester made a membrane of graphene oxide. They showed it blocked many gases and liquids but let water through. Sir Andre Geim said: "Helium gas is hard to stop. It slowly leaks even through a millimetre-thick window glass but our ultra-thin films completely block it. At the same time, water evaporates through them unimpeded. Materials cannot behave any stranger".
Graphene patents[change | change source]
- Chinese entities: 2,204
- US entities: 1,754
- South Korean entities: 1,160
- United Kingdom entities: 54
References[change | change source]
- H.P. Boehm, R. Setton & E. Stumpp (1994). "Nomenclature and terminology of graphite intercalation compounds". Pure and Applied Chemistry 66 (9): 1893–1901. .
- H.P. Boehm, A. Clauss, G.O. Fischer & U. Hofmann (1962). "Das Adsorptionsverhalten sehr dünner Kohlenstoffolien". Zeitschrift für anorganische und allgemeine Chemie 316 (3–4): 119–127. .
- Nobel Foundation announcement Archived 23 January 2012 at WebCite
- BBC Science & Technology News BBC News - Miracle material graphene can distil booze, says study
- Shukman, David 2013. Graphene: patent surge reveals global race. BBC News Science & Environment.