Static and dynamic models of the structure of magic silver nanoclusters

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• 作者：D. L. Tytik
• 关键词：PACS numbers 61.43.Bn ; 61.50. Ah
• 刊名：Protection of Metals and Physical Chemistry of Surfaces
• 出版年：2009
• 出版时间：March, 2009
• 年：2009
• 卷：45
• 期：2
• 页码：187-190
• 全文大小：189.8 KB

文摘

The relationship between static and dynamic models of the nanoparticle structure is considered based on the analysis of magic properties of silver clusters (results of molecular dynamics experiments). Dynamics of silver nanoclystals with cuboctahedral morphology in the nanosize range is characterized by the cooperative motion of atoms in the layers equidistant from the nanoparticle mass center. In this case, the cuboctahedral nanoparticles pass in a more stable icosahedral shape. The motion of atoms in a stable icosahedral cluster passes into a stationary oscillation mode (diffusion is absent). The distribution of middle positions around which atoms in a cluster oscillate suggests that the clusters simultaneously exhibit the properties of a liquid (reduced density that approaches the melt density) and a solid. The clusters have the regular non-crystalline structure (the shells of atoms equidistant from the cluster center form the Platonic and Archimedean bodies).