Critical sizes in the growth of Au clusters
Critical sizes in the growth of Au clusters
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DOI：
10.1016/s0009-2614(96)01535-7
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发表时间：
1997-02-21
影响因子：
2.8
通讯作者：
Whetten, RL
中科院分区：
文献类型：
--
作者：
Alvarez, MM;Khoury, JT;Whetten, RL
对金团簇生长的系统探索揭示了形成稳定团簇的临界尺寸。在过量弱结合长链n-烷基硫醇（酸）基团存在的情况下，团簇的质谱测量显示，在15k最小值附近（大约75个Au原子；k = 10(3) amu），以及在23k和29k处，新化合物的产率很高。结构分析表明它们的核心是相应有效直径（1.4 ~ 1.7 nm）的致密金属纳米晶体，可能是十面体紧密堆积和形态。这种特殊结构序列的精确身份现在可以寻求了。
A systematic exploration of the growth of Au clusters has revealed a critical size for the formation of stable assemblies. Mass-spectrometric measurements of clusters, as grown in the presence of an excess of weakly binding long-chain n-alkylthiol(ate) groups, show high yields of new compounds with core masses near the 15k minimum (approximate to 75 Au atoms; k = 10(3) amu), and also at 23k, and 29k. Structural analyses establish their cores as compact metal nanocrystals of the corresponding effective diameters (1.4 to 1.7 nm), probably of decahedral close-packing and morphology. The precise identities of this sequence of special structures can now be sought.