完全有序的全同金属纳米点阵列的生长与研究

GROWTH AND STUDY OF PERIODIC ARRAYS OF IDENTICAL METAL NANO-CLUSTERS

利用分子束外延在半导体Si(111)衬底上第一次成功地制备了尺寸相同、空间分布均匀的金属纳米团簇阵列 .文章作者提出的这种“幻数稳定团簇 +模板”的方法并不局限于制备某一种金属团簇阵列 ,且生长出的金属纳米点阵列非常稳定 .用扫描隧道显微镜 (STM)原位分析结合第一性原理计算 。

Periodic two-dimensional arrays of identical metal clusters of nanometer size and spacing have been successfully fabricated on a Si(111) substrate by molecule beam epitaxy. The method used takes advantage of surface mediated clustering on a suitable template. The versatility of the method is demonstrated for a broad range of metals on Si(111)-7×7 substrates and the nano-dot arrays are stable up tp 200℃. In situ scanning tunneling microscopy analysis of In clusters, combined with first-principles total energy calculations, unveils unique initial-stage atomic structures of the surface-supported clusters and the mechanism of formation of these structures.