全同周期排列的纳米团簇阵列的自发生长(英文)  

Spontaneous fabrication of periodic identical nanocluster arrays by magic clustering process on nanostructured template

作　　者：贾金锋[1] 厉建龙[1] 梁学锦[1] 刘熙[1] 王俊忠[1] 刘洪[1] 窦瑞芬 徐茂杰 潘明虎[1] 李绍春[1] 薛其坤[1] 李志强[2] John S Tse 张振宇 张绳百 

机构地区：[1]中国科学院物理研究所表面物理国家重点实验室,中国科学院国际量子结构中心 [2]National Research Council of Canada [3]Oak Ridge National Laboratory [4]中国科学院国际量子结构中心,北京100080 [5]National Renewable Energy Laboratory

出　　处：《电子显微学报》2002年第3期270-278,共9页Journal of Chinese Electron Microscopy Society

基　　金：WorkatIOPwassupportedbytheNSFofChina (No .6 96 2 5 6 0 8;6 0 0 76 0 0 9;1 0 1 34 0 30and 6 0 0 2 1 40 3) ;atNRELbytheUSDOE NERSCandtheU .S .DOE SC BESundercontractDE AC36 99GO1 037;andbyOakRidgeNationalLaboratory;managedbyUT Battell;LLC

摘　　要：我们提出了利用分子束外延的自组织生长过程大面积制备二维周期性纳米金属团簇阵列的一种方法。该方法的普适性通过研究Si(1 1 1 ) - 7× 7衬底上生长的Ⅲ族元素、贵金属、磁性金属以及它们的合金团簇得到证实。通过对In团族点阵的原位扫描隧道显微镜分析和第一性原理总能量计算 ,我们确定了这些团簇独特的原子结构 ,阐明了这些结构的形成机理。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.

关 键 词：全同周期排列 纳米闭簇阵列 自发生长 扫描隧道显微镜 分子束外延 纳米团簇 人造团簇超晶格 第一性原理理论 

分 类 号：TB383[一般工业技术—材料科学与工程] O485[理学—固体物理]