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

[1] MOLECULAR-BEAM EXPERIMENT FOR ADSORPTION-KINETICS AND CATALYTIC REACTIONS STUDIES [J].

CALPINI, B ;

CROCI, M ;

DAVID, R ;

MONOT, R .

JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A, 1992, 10 (05) :3221-3228

[2] STRUCTURAL CHARACTERIZATION OF METAL-METAL INTERFACES BY INTERMEDIATE-ENERGY AUGER-ELECTRON DIFFRACTION [J].

CHAMBERS, SA ;

ANDERSON, SB ;

WEAVER, JH .

PHYSICAL REVIEW B, 1985, 32 (08) :4872-4875

[3]

DELORENZI G, 1993, SURF SCI, V293, pL900, DOI 10.1016/0039-6028(93)90303-2

[4] ATOM BINDING AT OVERLAYERS - RE ON W(211) [J].

FINK, HW ;

EHRLICH, G .

SURFACE SCIENCE, 1986, 173 (01) :128-137

[5]

HAHN E, 1994, THESIS ECOLE POLYTEC

[6] ACTIVATION-ENERGY FOR SURFACE-DIFFUSION OF SI ON SI(001) - A SCANNING-TUNNELING-MICROSCOPY STUDY [J].

MO, YW ;

KLEINER, J ;

WEBB, MB ;

LAGALLY, MG .

PHYSICAL REVIEW LETTERS, 1991, 66 (15) :1998-2001

[7]

Poelsema B., 1989, SPRINGER TRACTS MODE, V115

[8] BUILDING ONE-DIMENSIONAL AND 2-DIMENSIONAL NANOSTRUCTURES BY DIFFUSION-CONTROLLED AGGREGATION AT SURFACES [J].

RODER, H ;

HAHN, E ;

BRUNE, H ;

BUCHER, JP ;

KERN, K .

NATURE, 1993, 366 (6451) :141-143

[9] CHANGING MORPHOLOGY OF METALLIC MONOLAYERS VIA TEMPERATURE-CONTROLLED HETEROEPITAXIAL GROWTH [J].

RODER, H ;

BRUNE, H ;

BUCHER, JP ;

KERN, K .

SURFACE SCIENCE, 1993, 298 (01) :121-126

[10] LAYER-BY-LAYER GROWTH OF AG ON AG(111) INDUCED BY ENHANCED NUCLEATION - A MODEL STUDY FOR SURFACTANT-MEDIATED GROWTH [J].

ROSENFELD, G ;

SERVATY, R ;

TEICHERT, C ;

POELSEMA, B ;

COMSA, G .

PHYSICAL REVIEW LETTERS, 1993, 71 (06) :895-898

← 1 2 →