MICROSCOPIC VIEW OF NUCLEATION ON SURFACES

被引：186
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.
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页码：1955 / 1958
页数：4
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