纳米团簇
笼子
棱锥(几何)
星团(航天器)
范德瓦尔斯力
结晶学
化学
化学物理
方形金字塔
过渡金属
纳米技术
材料科学
分子
物理
晶体结构
光学
计算机科学
有机化学
组合数学
数学
程序设计语言
催化作用
作者
Wei Huang,Satya S. Bulusu,Ranjan Pal,Xiao Cheng Zeng,Lai Sheng Wang
出处
期刊:ACS Nano
[American Chemical Society]
日期:2009-04-16
卷期号:3 (5): 1225-1230
被引量:103
摘要
How nanoclusters transform from one structural type to another as a function of size is a critical issue in cluster science. Here we report a study of the structural transition from the golden cage Au16− to the pyramidal Au20−. We obtained distinct experimental evidence that the cage-to-pyramid crossover occurs at Au18−, for which the cage and pyramidal isomers are nearly degenerate and coexist experimentally. The two isomers are observed and identified by their different interactions with O2 and Ar. The cage isomer is observed to be more reactive with O2 and can be preferentially “titrated” from the cluster beam, whereas the pyramidal isomer has slightly stronger interactions with Ar and is favored in the Au18Arx− van der Waals complexes. The current study allows the detailed structural evolution and growth routes from the hollow cage to the compact pyramid to be understood and provides information about the structure−function relationship of the Au18− cluster.
科研通智能强力驱动
Strongly Powered by AbleSci AI