Deposition of AuN clusters on Au(111) surfaces.: II.: Experimental results and comparison with simulations
Deposition of AuN clusters on Au(111) surfaces.: II.: Experimental results and comparison with simulations
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DOI：
10.1103/physrevb.62.2835
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发表时间：
2000-07-15
影响因子：
3.7
通讯作者：
Hou, M
中科院分区：
文献类型：
--
作者：
Bardotti, L;Prével, B;Hou, M
用扫描探针显微镜原位分析了室温超高真空低能束沉积在金（111）表面的金膜形成过程。既没有检测到表面上簇的扩散，也没有检测到簇之间的聚合。薄膜是由表面的随机铺装形成的，因此，亚单层薄膜是由三维孤立的颗粒组成的，而多层薄膜则表现出纳米结构的形态。采用与实验相同的入射簇大小分布进行分子动力学模拟，揭示了冲击能量对膜形态的影响。对于入射团簇的低动能（0.25 eV/原子），模拟的形貌与实验测量结果非常吻合。
The formation of gold films obtained by low-energy cluster beam deposition at room temperature in ultrahigh vacuum on a gold (111) surface has been analyzed in situ by scanning probe microscopy. Neither diffusion of the clusters on the surface, nor coalescence between clusters has been detected. The films are formed by a random pavement of the surface and as a consequence submonolayer films are composed by three-dimensional isolated particles, whereas multilayer films exhibit a nanostructured morphology. Molecular dynamics simulations, using the same size distribution of incident clusters as in the experiment, reveal the influence of the impact energy on the film morphology. For a low kinetic energy of the incident clusters (0.25 eV/atom), the simulated morphology is in excellent agreement with experimental measurements.