Stick-sudden-rotation and structural polymorphism of (C70)mAun hybrid nanoclusters

Yitao Wang; Dogan Kaya; Jianzhi Gao; Quanmin Guo

doi:10.1021/acs.jpcc.9b01349

Stick-sudden-rotation and structural polymorphism of (C70)mAun hybrid nanoclusters

Yitao Wang, Dogan Kaya, Jianzhi Gao, Quanmin Guo

Physics and Astronomy

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Abstract

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 ∼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.

Original language	English
Pages (from-to)	12791-12796
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	123
Issue number	20
Early online date	2 May 2019
DOIs	https://doi.org/10.1021/acs.jpcc.9b01349
Publication status	Published - 23 May 2019

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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Wang_et_al_Stick_sudden_rotation_and_structural_polymorphism_of_(C70)mAun_hybrid_nanoclusters_Journal_of_Physical_Chemistry_C_2019
Checked for eligibility: 31/07/2019 This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Physical Chemistry C, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see: https://doi.org/10.1021/acs.jpcc.9b01349
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Cite this

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abstract = "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 ∼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. ",

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AB - 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 ∼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.

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Stick-sudden-rotation and structural polymorphism of (C70)mAun hybrid nanoclusters

Abstract

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