Diffusion controlled growth of metallic nanoclusters at selected surface sites
Diffusion controlled growth of metallic nanoclusters at selected surface sites
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DOI：
10.1063/1.361290
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发表时间：
1996-03-15
影响因子：
3.2
通讯作者：
Palmer, RE
中科院分区：
文献类型：
--
作者：
Francis, GM;Kuipers, L;Palmer, RE
我们使用扫描电子显微镜研究了高度定向热解石墨表面上原子级三维银颗粒的生长。通过控制生长参数，团簇生长被限制在台阶上，避免梯台形核。通过这种方式，产生了直径约 10 nm 的准一维银纳米簇链。结果表明，一种重要的新方法对于创建受控纳米级结构是可行的。全面的表面研究表明，簇的迁移性和聚结在台阶的生长机制中发挥着重要作用。还发现石墨表面具有几种不同类型的表面台阶。对台阶上的团簇分布进行了定量分析，以研究 50 至 205 摄氏度温度下的成核和生长过程。 (C) 1996 美国物理研究所。
We have investigated the growth of three-dimensional Ag particles at atomic steps on the surface of highly oriented pyrolytic graphite using a scanning electron microscope. By controlling the growth parameters the cluster growth was confined to the steps avoiding terrace nucleation. In this way quasi-one-dimensional chains of Ag nanoclusters of approximately 10 nm diam were produced. The results suggest the viability of an important new rote to the creation of controlled nanoscale structures. A comprehensive surface study indicates that cluster mobility and coalescence play an important role in the growth mechanism on the steps. Evidence was also found that the graphite surface has several different types of surface steps. A quantitative analysis of the cluster distribution on the steps was performed, to investigate the nucleation and growth processes at temperatures form 50 to 205 degrees C. (C) 1996 American Institute of Physics.