首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Competition among fcc-like, double-layered flat, tubular cage, and close-packed structural motifs for medium-sized Au-n (n=21-28) clusters
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Competition among fcc-like, double-layered flat, tubular cage, and close-packed structural motifs for medium-sized Au-n (n=21-28) clusters

机译:中型Au-n(n = 21-28)集群的类似fcc的双层扁平管状笼状结构和紧密堆积的结构图案之间的竞争

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摘要

Using density functional theory calculations, we compared four kinds of possible structural motifs of the medium-sized Au-n (n = 21-28) clusters, i.e., fcc-like, double-layered flat, tubular cage, and close-packed. Our results show strong competition between those structural motifs in the medium-sized gold clusters. Au-n (n = 21-23) adopt fcc-like structure owing to the high stability of tetrahedral Au-20. A structural transition from fcc-like to tubular occurs at Au-24, and the tubular motif continues at Au-27 and Au-28. Meanwhile, a double-layered flat structure was found at Au-25, and a pyramid-based structure at Au-26. The relationship between electronic properties and cluster geometry was also discussed.
机译:使用密度泛函理论计算,我们比较了中型Au-n(n = 21-28)团簇的四种可能的结构图案,即fcc状,双层扁平,管状笼和密堆积。我们的结果表明,中型金簇中的那些结构图案之间存在激烈的竞争。由于四面体Au-20的高稳定性,Au-n(n = 21-23)采用类似fcc的结构。从类似fcc到管状的结构发生在Au-24处,管状基序在Au-27和Au-28处继续。同时,在Au-25处发现了双层扁平结构,在Au-26处发现了金字塔基结构。还讨论了电子性质与团簇几何形状之间的关系。

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