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• W2019294729 abstract "Clusters containing only a handful of atoms have been the subject of extensive theoretical and experimental studies, but their direct imaging has not been possible so far, with information about their structure provided mainly by theory. Here we report a direct atomically-resolved observation of a single Si6 cluster trapped in a graphene nanopore. Furthermore, though electron-beam-induced irreversible atomic displacements have been reported before, here we report a sequence of images that show a reversible, oscillatory, conformational change: one of the Si atoms jumps back and forth between two different positions. Density-functional calculations show that the embedded cluster is exploring metastable configurations under the influence of the beam, providing direct information on the atomic-scale energy landscape. The capture of a Si cluster in a graphene nanopore suggests the possibility of patterning nanopores and assembling atomic clusters with a potential for applications. Studying the structural dynamics of clusters of just a handful of atoms is challenging. But by imaging a cluster of six silicon atoms trapped in a pore of a sheet of graphene with an electron microscope, Lee et al. observe the reversible switching of the cluster between different metastable structural states." @default.
• W2019294729 created "2016-06-24" @default.
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• W2019294729 date "2013-04-03" @default.
• W2019294729 modified "2023-09-26" @default.
• W2019294729 title "Direct visualization of reversible dynamics in a Si6 cluster embedded in a graphene pore" @default.
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• W2019294729 doi "https://doi.org/10.1038/ncomms2671" @default.
• W2019294729 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/23552065" @default.
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