Transition from covalent to metallic behavior in group-14 clusters

被引：78
|
作者：
Shvartsburg, AA [1 ]
Jarrold, MF [1 ]
机构：
[1] Northwestern Univ, Dept Chem, Evanston, IL 60208 USA
来源：
CHEMICAL PHYSICS LETTERS | 2000年 / 317卷 / 06期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/S0009-2614(99)01416-5
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
We have probed the structures of Pb-n cations up to n = 32 using ion mobility measurements. These species assume compact near-spherical morphologies for all sizes studied. This behavior is characteristic of clusters of the metallic elements. Silicon. germanium, and tin clusters in the same size range have previously been found to adopt prolate,geometries produced by stacking tricapped trigonal prism units. So the transition to 'normal' metal cluster growth in the group-14 elements occurs between tin and lead, one row lower than the transition from covalent to metallic bonding in the bulk solids under ambient conditions. (C) 2000 Elsevier Science B.V. All rights reserved.
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页码：615 / 618
页数：4
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