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Probing dispersions of graphene-like molecules

The dispersion characteristics of Hexabenzocoronene, an analogue to small graphene flakes, in a wide range of solvents have been reported in the Journal of the American Society by a collaboration of the Costantini group with Trinity College Dublin, Max Planck Institute for Polymer Research, University of Oxford and STFC Daresbury Laboratories. For the mass-production of graphene, dispersion within a solvent at a high monomeric concentration is an essential requirement, so here the dispersion has been probed in a large number of solvents with a number of different metrics. Furthermore, the self-assembly of HBC on solid surfaces has been investigated using STM and TEM, where an ordered single-molecule thick layer of HBC is observed. Here, direct observation of the HBC HOMO has been achieved with STM on a graphite surface, demonstrating the relatively weak electronic coupling between the molecule and substrate. More details can be found at http://pubs.acs.org/doi/abs/10.1021/ja303683v

Fri 13 Jul 2012, 13:16 | Tags: publications MatPolymers AnalSciInst