期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 144, 期 3, 页码 1158-1163出版社
AMER CHEMICAL SOC
DOI: 10.1021/jacs.1c12713
关键词
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资金
- National Key Research and Development Program of China [2017YFA0700701]
- Joint Research Fund Liaoning-Shenyang National Laboratory for Materials Science [2019JH3/30100020]
- National Natural Science Foundation of China [91960202]
The study observed the packing structure of gold nanoribbons with heptagonal clusters, and revealed the structure transition and the quantum change of conductance through in situ observation and theoretical calculations.
Transforming periodic crystals into packing of atomic clusters is attracting enormous interest for both fundamental research and potential application, but it still remains a big challenge for noble metals. Here, we have observed gold nanoribbons packed with heptagonal clusters, where every two or three constituent clusters connect edge-to-edge with their neighbors. This is the first reported metallic structure packed from building blocks with heptagonal symmetry. The duster-packed nanoribbons transited from two-dimensional hexagonal structure under tensile condition and a reverse transition occurred by compression, resolved by in situ observation. The cluster-packed structure was stabilized by the s-d orbital hybridization. Theoretical calculations demonstrate that the conductance of the ribbons undergoes a quantized change from 6 to 4 G(0) (G(0) = 2e(2)/h) during the phase transition and backward for the reverse transition.
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