Stick-Sudden-Rotation and Structural Polymorphism of (C-70)(m)-(Au)(n) Hybrid Nanoclusters


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Wang Y., KAYA D. , GAO J., Guo Q.

JOURNAL OF PHYSICAL CHEMISTRY C, cilt.123, ss.12791-12796, 2019 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 123 Konu: 20
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1021/acs.jpcc.9b01349
  • Dergi Adı: JOURNAL OF PHYSICAL CHEMISTRY C
  • Sayfa Sayıları: ss.12791-12796

Özet

We fabricated magic number (C-70)(m)-(Au)(n) clusters on the Au(111) substrate. These clusters are stable at room temperature but display unpredictable rotational movement. The time duration between two successive rotations is in the order of similar to hour. The cluster rotation is a thermally activated process due to energy fluctuation, which is more significant for small clusters. We followed the rotational movement of (C-70)(10)-(Au)(35) clusters using scanning tunneling microscopy. Our observation suggests that thermal fluctuation leads to rapid diffusion of Au atoms at the edges of the cluster and the cluster has many metastable configurations associated with structural polymorphism.

We fabricated magic number (C70)m-(Au)n clusters on the Au(111) substrate. These clusters are stable at room temperature, but display unpredictable rotational movement. The time duration between two successive rotations is in the order of ~hour. The cluster rotation is a thermally activated process due to energy fluctuation which is more significant for small clusters. We followed the rotational movement of (C70)10-(Au)35 clusters using scanning tunnelling microscopy. Our observation suggests that thermal fluctuation leads to rapid diffusion of Au atoms at the edges of the cluster and the cluster has many meta-stable configurations associated with structural polymorphism.