期刊
CHEMICAL PHYSICS LETTERS
卷 388, 期 4-6, 页码 463-467出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cplett.2004.03.036
关键词
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The reactions of tungsten clusters, W-n(+) (n = 1-5), with silane and their sequential reactions were investigated using FTICR mass spectrometry. It was found that the Si or SiH2 addition to the clusters, accompanied by H-2 release, occurred for every collision with silane and then suddenly stopped at the specific silicon atom numbers of m: m = 12 for n = 1, m = 17 and 18 for n = 2, m = 22 for n = 3, m = 25 and 26 for n = 4 and m = 29 for n = 5. These values coincide with the surrounding atom numbers of a simple close packing model, suggesting the formation of stable silicon cages encapsulating tungsten clusters. (C) 2004 Elsevier B.V. All rights reserved.
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