期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 116, 期 36, 页码 19327-19334出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp305089d
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资金
- Deutsche Forschungsgemeinschaft [SPP 1153]
- NRW Forschungsschule
- Academy of Finland [136165]
- Academy of Finland (AKA) [136165, 136165] Funding Source: Academy of Finland (AKA)
High-precision experiments and atomistic simulations are used to determine the flattening kinetics of mass-selected 55-147 atom Ag clusters deposited on Au(111). The clusters are shown to align epitaxially and decay through an exchange pathway with a range of rate-limiting barriers, from ca. 0.25 to 0.4 eV, depending on the shape of the particle. It is also shown that nonlocal effects at the Au-Ag interface lead to a dramatic reduction in the barrier of the dominant transition pathway, requiring ab initio methods for correct modeling. As a result, quantitative correspondence between experimental and simulated island heights is obtained.
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