News tagged with graphane

Graphane is a 2-dimensional polymer of carbon and hydrogen with the formula unit (CH)n where n is large. 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. Graphane is a form of hydrogenated graphene. The first theoretical description of graphane was reported in 2003 and its preparation was reported in 2009.

Full hydrogenation from both sides of graphene sheet results in graphane, but partial hydrogenation leads to hydrogenated graphene.

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. Annealing allows the hydrogen to disperse, reverting to graphene.

p-doped graphane is postulated to be a high temperature BCS theory superconductor with a Tc above 90 K

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