Epitaxial orientations of O2 monolayers on graphite by superlattice formation
Epitaxial orientations of O2 monolayers on graphite by superlattice formation
复制标题
通过超晶格形成在石墨上单层 O2 的外延取向
DOI：
10.1063/1.449992
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发表时间：
1986
期刊：
影响因子：
--
通讯作者：
R. Etters
中科院分区：
文献类型：
--
作者：
K. Flurchick;R. Etters
对包含多达841个分子的注册超晶格进行了搜索，这表明它们提供了一种机制，用于理解在低能电子衍射（LEED）测量沉积在石墨上的单层O2中观察到的取向外延。发现δ、γ ′、γ 1和γ 2相的超晶格与外延取向和晶胞偏离中心矩形的实验结果非常一致。结果表明，分子-衬底相互作用的横向变化是导致外延生长和晶胞偏离中心矩形的主要原因。本文还研究了沉积在石墨上的尺寸为1≤N≤16的O_2团簇的结构和外延取向。
A search for registered superlattices containing as many as 841 molecules has been conducted which shows that they provide a mechanism for understanding the orientational epitaxies observed in low‐energy electron diffraction (LEED) measurements of monolayer O2 deposited on graphite. Superlattices for the δ, δ’, ζ1, and ζ2 phases were found that give excellent agreement with experiment for the epitaxial orientations and the departure of the unit cell from centered rectangular. It is concluded that the lateral variations in the admolecule–substrate interaction are responsible for the epitaxy and the departure of the unit cell from centered rectangular. The structure and epitaxial orientations of O2 clusters of size 1≤N≤16, deposited on graphite, are also investigated.