Pearmain D, Park S J, Abdela A, Palmer R E, Li Z Y
Nanoscale Physics Research Laboratory, School of Physics and Astronomy, University of Birmingham, Edgbaston B15 2TT, UK.
Nanoscale. 2015 Dec 14;7(46):19647-52. doi: 10.1039/c5nr06473b. Epub 2015 Nov 9.
Size-selected Pd nanoclusters in the size range from 887 to 10,000 atoms were synthesized in a magnetron sputtering, inert gas condensation cluster beam source equipped with a time of flight mass filter. Their morphologies were investigated using scanning transmission electron microscopy (STEM) and shown to be strongly size-dependent. The larger clusters exhibited elongated structures, which we attribute to the aggregation, through multiple collisions, of smaller clusters during the gas phase condensation process. This was confirmed from the atomically resolved STEM images of the Pd nanoclusters, which showed smaller primary clusters with their own crystalline structures.
在配备飞行时间质量过滤器的磁控溅射惰性气体凝聚团簇束源中合成了原子数在887至10000之间的尺寸选择钯纳米团簇。使用扫描透射电子显微镜（STEM）研究了它们的形态，结果表明形态强烈依赖于尺寸。较大的团簇呈现出细长结构，我们将其归因于在气相凝聚过程中较小团簇通过多次碰撞而发生的聚集。这从钯纳米团簇的原子分辨STEM图像得到证实，该图像显示出具有自身晶体结构的较小初级团簇。
