镍
星团(航天器)
氮气
Atom(片上系统)
化学
分子
金属
结晶学
化学物理
吸附
氮原子
结合能
计算化学
原子物理学
物理化学
群(周期表)
物理
有机化学
计算机科学
嵌入式系统
程序设计语言
作者
E. K. Parks,Ling Zhu,Jia Jen Ho,S. J. Riley
摘要
The geometrical structure of small nickel clusters is probed via molecular adsorption of nitrogen on their surfaces. Nitrogen uptake patterns can be rationalized with the proposed structures if it is assumed that N2 binds to every exposed nickel atom, that the binding energies decrease with increasing metal—metal coordination, and that atoms that are four or less coordinate can bind two nitrogen molecules. In some cases nitrogen adsorption causes a change in cluster structure, usually to one that can accommodate more nitrogen molecules. Cluster structures are proposed for all clusters (bare and nitrogenated) in the 3–15-atom size range except Ni4 and Ni11. The nitrogen uptake for Ni4 is consistent with virtually any structure, and the data for Ni11 could not be interpreted in terms of a specific structure. In general, nickel cluster structures are different from those found for rare gas clusters as well as those derived from bulk packing. A comparison of the experimental results with existing theoretical calculations is presented.
科研通智能强力驱动
Strongly Powered by AbleSci AI