Schematic of the pathway describing the evolution of adsorbed ethene (top left) to graphene (bottom left). The sequence of intermediates identified in the study and their respective appearance temperatures are indicated. Credit: F. Esch, R. Schaub, U. Landman
An international has developed a new way to produce single-layer graphene from a simple precursor: ethene aka ethylene – the smallest alkene molecule, which contains just two atoms of carbon. By heating the ethene in stages to a temperature of slightly >700C – hotter than had been attempted before – the researchers produced pure layers of graphene on a rhodium catalyst substrate. The stepwise heating and higher temperature overcame challenges in earlier efforts to produce graphene directly from hydrocarbon precursors.
Because of its l...
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