NEIGHBOR DRIVEN MOBILITY OF SILVER ADATOMS ON PD(100) MEASURED BY THERMAL HELIUM SCATTERING

被引：14

作者：

VANDONI, G ^{[1
]}

FELIX, C ^{[1
]}

MONOT, R ^{[1
]}

BUTTET, J ^{[1
]}

HARBICH, W ^{[1
]}

机构：

[1] PHB ECUBLENS,ECOLE POLTECH FED,INST PHYS EXPTL,CH-1015 LAUSANNE,SWITZERLAND

来源：

SURFACE SCIENCE | 1994年 / 320卷 / 1-2期

关键词：

D O I：

10.1016/0039-6028(94)00564-8

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：

Thermal helium scattering is used to characterize the deposition of silver atoms on Pd (100) in the coverage range 0 to 10% of a monolayer, at surface temperature between 80 and 160 K, the latter being the threshold of adatom mobility. The attenuation of the specular helium intensity as a function of coverage cannot be interpreted by a statistical distribution which excludes any mobility of the deposited adatoms. The data are well simulated by a model implying that an adatom is not stable if it is separated from another adparticle by only one adsorption site, but it would rather move and form a dimer or enlarge a cluster. This behavior is confirmed by Monte Carlo simulations. The cross section of the silver adatom for diffuse helium scattering is measured to be 109 Angstrom(2).

引用

页码：L63 / L67

页数：5

共 15 条

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