期刊
NANO LETTERS
卷 12, 期 11, 页码 5510-5514出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl303429z
关键词
Size-selected; clusters; gold; chiral; aberration-corrected; STEM
类别
资金
- EPSRC
- TSB
- Advantage West Midlands (AWM)
- European Regional Development Fund (ERDF)
We report the atomic-scale structures and fluctuating dynamical behavior of size-selected Au-55 clusters obtained by aberration-corrected scanning transmission electron microscopy coupled with systematic STEM simulations. No high symmetry structures (face-centered cubic polyhedron, icosahedron, or decahedron) were observed in our statistical investigation. We find Au-55 clusters that are characteristic of the theoretically predicted chiral structure and similar sister isomers (which together we define as the chiral structural zone). The chiral structural zone was found to arise repeatedly in the time-lapse sequences of images we measured, though other amorphous-like structures are also frequently observed. The approach demonstrated here can be applied to identify specific low-symmetry atomic structures in other small dusters and distinguish them unambiguously from high-symmetry isomers.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据