Graphane
| Graphane | |
|---|---|
| File:Graphane.png | |
| Identifiers | |
| CAS number | 1221743-01-6 7px |
| Molecular formula | (CH)n |
| Molar mass | Variable |
| 14px (verify) (what is: 10px/10px?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) | |
| Infobox references | |
Graphane is a 2-dimensional polymer of carbon and hydrogen with the formula unit (CH)n where n is large. Graphane should not be confused with graphene, a 2-dimensional form of carbon alone. Graphane is a form of hydrogenated graphene. Graphane's carbon bonds are in sp3 configuration, as opposed to graphene's sp2 bond configuration, thus graphane is a 2-D analog of cubic diamond.
The first theoretical description of graphane was reported in 2003[1] and its preparation was reported in 2009.
Full hydrogenation from both sides of a graphene sheet results in graphane,[2] but partial hydrogenation leads to hydrogenated graphene.[3]
If graphene rests on a silica surface, hydrogenation on only one side of graphene preserves the hexagonal symmetry in graphane. One-sided hydrogenation of graphene becomes possible due to the existence of ripplings. Since the latter are distributed randomly, obtained graphane is expected to be disordered material in contrast to two-sided graphane.[3] Annealing allows the hydrogen to disperse, reverting to graphene.[4]
p-doped graphane is postulated to be a high temperature BCS theory superconductor with a Tc above 90 K.[5]
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