Graphane as polyhydride of graphene. Computational synthesis applied to two-side membrane

Details Graphane as polyhydride of graphene. Computational synthesis applied to two-side membrane Graphane as polyhydride of graphene. Computational synthesis applied to two-side membrane

2011-02-04

arxiv.org/abs/1102.0922v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

21 pages, 6 figures, presented at the III Nanotechnology International Forum RUSNANOTECH 2010 held at the Moscow Expocentre No

Scientific paper

A great efficacy of molecular quantum chemistry applied to basic graphene problems has been recently demonstrated by the authors when studying the formation of peculiar composites between carbon nanotubes and graphene as well as considering tensile deformation and fracture of a graphene sheet in due course of a mechanochemical reaction. The optimistic results obtained in the studies make it possible to shift attention from the solid state problems and consider the graphane formation as multistep hydrogenation of the pristine molecule. To proceed we have to answer the following questions: 1) which kind of the hydrogen adsorption, namely, molecular or atomic, is the most probable; 2) what is a characteristic image of the hydrogen atom attachment to the substrate; 3) which carbon atom (or atoms) is the first target subjected to the hydrogen attachment and how carbon atoms are selected for the next steps of the adsorption; 4) is there any connection between the sequential adsorption pattern and cyclohexane conformers. First results obtained on this way are presented in the current paper. The calculations were performed within the framework of unrestricted broken symmetry Hartree-Fock approach by using semiempirical AM1 technique.

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