Self-assembled germanium nano-clusters on silver(110)

被引：17

作者：

Léandri, C

Oughaddou, H

Gay, JM

Aufray, B

Le Lay, G

Bibérian, JP

Ranguis, A

Bunk, O

Johnson, RL

机构：

[1] CNRS, CRMCN, Dept Phys, F-13288 Marseille 09, France

[2] Univ Hamburg, Inst Expt Phys 2, D-22761 Hamburg, Germany

来源：

SURFACE SCIENCE | 2004年 / 573卷 / 02期

关键词：

self-assembly; clusters; surface structure; morphology; roughness; and topography; germanium; silver; scanning tunneling microscopy; X-ray scattering; diffraction; and reflection;

D O I：

10.1016/j.susc.2004.10.005

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 adsorption of germanium on Ag(110) has been investigated by scanning tunnelling microscopy (STM), as well as surface X-ray diffraction (SXRD). At 0.5 germanium monolayer (ML) coverage, Low Energy Electron Diffraction (LEED) patterns reveals a sharp c(4 x 2) superstructure. Based on STM images and SXRD measurements, we present an atomic model of the surface structure with Ge atoms forming tetramer nano-clusters perfectly assembled in a two-dimensional array over the silver top layer. The adsorption of the germanium atoms induces a weak perturbation of the Ag surface. Upon comparison with results obtained on the (111) and (100) faces, we stress the role played by the relative interactions between silver and germanium on the observed surface structures. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：L369 / L374

页数：6

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