Spontaneous fabrication of periodic identical nanocluster arrays by magic clustering process on nanostructured template
Spontaneous fabrication of periodic identical nanocluster arrays by magic clustering process on nanostructured template
复制标题
通过纳米结构模板上的魔法聚类过程自发制造周期性相同的纳米团簇阵列
DOI：
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
Qi-Kun Xue
中科院分区：
文献类型：
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作者：
J. F. Jia;J. L. Li;Xue-Jin Liang;Xi Liu;Jun-Zhong Wang;Hong Liu;Rui-Feng Dou;Mao-Jie Xu;Ming-Hu Pan;Shao-Chun Li;Qi-Kun Xue
我们提出了一种方法，通过该方法可以自发地获得周期性的二维阵列的相同的金属簇的纳米尺寸和间距通过使用标准的分子束外延。这种方法的通用性被证明是广泛的，如第III族金属（In和Ga），贵金属（Ag），磁性金属（Mn和Co），以及它们的合金在硅（111）-7 7衬底。In团簇的原位扫描隧道显微镜分析，结合第一性原理总能量理论计算，揭示了半导体表面支撑团簇独特的初始阶段原子结构以及导致该方法成功的关键步骤。团簇和表面之间的强相互作用是观察到的团簇大小以及阵列的晶格类型的关键。
We propose a method by which periodic two dimensional arrays of identical metal clusters of nanometer size and spacing could be spontaneously obtained by using standard molecular beam epitaxy. The versatility of this method is demonstrated for a broad range of metals such as group III (In and Ga), noble metal (Ag), magnetic metal (Mn and Co), and their alloys on silicon (111)-7×7 substrate. In situ scanning tunneling microscopy analysis of In clusters, combined with first principles total energy theoretical calculations, unveils unique initial stage atomic structures of the semiconductor surface supported clusters and the vital steps that lead to the success of this method. A strong interaction between the clusters and the surface holds the key to the observed cluster sizes, as well as to the lattice type of the arrays.