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- W2891554551 abstract "Metal clusters are partway between molecular and bulk systems and thus exhibit special physical and chemical properties. Atoms can rearrange within a cluster to form different structural isomers. Internal degrees of freedom and the interaction with the support - which both are dependent on cluster size - can promote diffusion across a support. Here, we show how fast scanning tunneling microscopy (FastSTM) can be used to investigate such dynamical behavior of individual clusters on the example of Pdn (1<=n<=19) on a hexagonal boron nitride nanomesh on Rh(111), in particular pertaining to minority species and rare events. By tuning the cluster size and varying the temperature to match the dynamics to the FastSTM frame rate, we followed steady state diffusion of clusters and atoms inside the nanomesh pore and reversible cluster isomerization in situ. While atoms diffuse along the rim of a pore, a small cluster experiences a corrugation in the potential energy landscape and jumps between six sites around the center of the pore. The atom and cluster diffusion between pores is strongly influenced by defects." @default.
- W2891554551 created "2018-09-27" @default.
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- W2891554551 date "2018-09-07" @default.
- W2891554551 modified "2023-10-04" @default.
- W2891554551 title "A Microscopy Approach to Investigating the Energetics of Small Supported Metal Clusters" @default.
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- W2891554551 doi "https://doi.org/10.1021/acs.jpcc.8b06866" @default.
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