SURFACE-STRUCTURE INVESTIGATION OF NITROGEN AND OXYGEN ON CU3AU(100)

被引：84

作者：

NIEHUS, H ^{[1
]}

ACHETE, C ^{[1
]}

机构：

[1] UFRJ, COPPE, BR-21945 RIO DE JANEIRO, BRAZIL

来源：

SURFACE SCIENCE | 1993年 / 289卷 / 1-2期

关键词：

D O I：

10.1016/0039-6028(93)90884-M

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The investigation of clean Cu3Au(100) with 180-degrees low-energy ion scattering and detection of neutrals (NICISS) shows that the surface is terminated at room temperature with the Au-rich plane. The clean surface exhibits a LEED c(2 x 2) superstructure and has been imaged by scanning tunneling microscopy (STM) in ultrahigh vacuum with atomic resolution. The measured different grey scale heights in the unit cell can be attributed to the position of Au and Cu atoms, respectively. Adsorption of atomic nitrogen starts with the formation of islands. From the NICISS data it has been concluded that after saturation with O or N the surface is terminated with the Cu plane. On the basis of STM and direct recoil spectroscopy (DRS) the fourfold hollow site above Cu atoms has been deduced for both adsorbates.

引用

页码：19 / 29

页数：11

共 27 条

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