Germanium adsorption on Ag(111): An AES-LEED and STM study

被引：11
|
作者：
Oughaddou, H.
Mayne, A.
Aufray, B.
Biberian, J. P.
Le Lay, G.
Ealet, B.
Dujardin, G.
Kara, A. [1 ]
机构：
[1] Univ Cent Florida, Dept Phys, Orlando, FL 32816 USA
[2] Univ Paris 11, LPM, F-91405 Orsay, France
[3] CNRS, CRMN, F-13288 Marseille 09, France
来源：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY | 2007年 / 7卷 / 09期
关键词：
STM; AES; LEED; ge nanostructures; self-organization; silver; auger;
D O I：
10.1166/jnn.2007.677
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The adsorption of germanium on Ag(111) has been investigated using Scanning Tunneling Microscopy, Auger Electron Spectroscopy and Low Energy Electron Diffraction. From the shape of the Auger peak-to-peak versus time curves, we deduce that at room temperature the growth mode is nearly layer-by-layer at least for the first two layers. In the sub-monolayer range, the growth starts by the formation of a (root 3 x root 3)R30 degrees surface superstructure which is complete at 1/3 monolayer coverage. Beyond this coverage a rectangular c(root 3 x 7) superstructure is observed. STM images reveal that this last reconstruction is formed by an ordered arrangement of self-assembled Ge tetramers giving rise to a surprising undulation of the surface.
引用
收藏
页码：3189 / 3192
页数：4
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