期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 136, 期 36, 页码 12746-12752出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja506554j
关键词
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资金
- King Abdullah University of Science and Technology
- Saudi Basic Industries Corporation
- A*Star of Singapore [SERC 112-120-2011]
A BoerdijkCoxeterBernal (BCB) helix is made of linearly stacked regular tetrahedra (tetrahelix). As such, it is chiral without nontrivial translational or rotational symmetries. We demonstrate here an example of the chiral BCB structure made of totally symmetrical gold atoms, created in nanowires by direct chemical synthesis. Detailed study by high-resolution electron microscopy illustrates their elegant chiral structure and the unique one-dimensional pseudo-periodicity. The BCB-type atomic packing mode is proposed to be a result of the competition and compromise between the lattice and surface energy.
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