Silicene was claimed to be a novel silicon allotrope analog of graphene. Based on the evidence that silicon and silver are bulk immiscible, the Ag(111) turned out to be the substrate of election for silicene synthesis. All theoretical models of silicene on Ag(111) rely on this assumption, in contrast with recent findings showing that the silicon grows inside the first layer of the Ag(111) substrate rather than on top of it. Here we report on a combined theoretical and experimental study, unveiling the basic intermixing mechanism between Si and the topmost layer Ag atoms occurring in the nucleation process.
Unexpected silicon reactivity ate the Ag(111) surface: a study towards silicone definition
M Satta;S Colonna;R Flammini;A Cricenti;F Ronci
2015
Abstract
Silicene was claimed to be a novel silicon allotrope analog of graphene. Based on the evidence that silicon and silver are bulk immiscible, the Ag(111) turned out to be the substrate of election for silicene synthesis. All theoretical models of silicene on Ag(111) rely on this assumption, in contrast with recent findings showing that the silicon grows inside the first layer of the Ag(111) substrate rather than on top of it. Here we report on a combined theoretical and experimental study, unveiling the basic intermixing mechanism between Si and the topmost layer Ag atoms occurring in the nucleation process.File in questo prodotto:
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