MICROSCOPIC VIEW OF NUCLEATION ON SURFACES

被引：187

作者：

BRUNE, H

RODER, H

BORAGNO, C

KERN, K

机构：

[1] Institut de Physique Expérimentale, Ecole Polytechnique Fédérale de Lausanne

来源：

PHYSICAL REVIEW LETTERS | 1994年 / 73卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.73.1955

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Nucleation has been studied on atomic scale for Ag deposition on a Pt(111) surface at low temperature (50-120 K) by means of variable-temperature scanning tunneling microscopy. From island density versus coverage data, the transition from the initial steps of nucleation to growth and coalescence has been studied as a function of temperature. The data show that dimers are stable nuclei for T less-than-or-equal-to 110 K, which facilitates quantitative comparison with rate equations from nucleation theory. The migration barrier E(m) = 157 +/- 10 meV is determined for Ag adatoms on Pt(111) and compared with theoretical values.

引用

页码：1955 / 1958

页数：4

共 19 条

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