Ordered layers of Co clusters on BN template layers
Ordered layers of Co clusters on BN template layers
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DOI：
10.1103/physrevb.78.165430
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发表时间：
2008-10
影响因子：
3.7
通讯作者：
Jian Zhang;V. Sessi;C. H. Michaelis;I. Brihuega;J. Honolka;K. Kern;R. Skomski;Xumin Chen;Geoffrey A. Rojas;A. Enders
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文献类型：
--
作者：
Jian Zhang;V. Sessi;C. H. Michaelis;I. Brihuega;J. Honolka;K. Kern;R. Skomski;Xumin Chen;Geoffrey A. Rojas;A. Enders
介绍并研究了缓冲层辅助生长BLAG合成高有序单层金属纳米团簇的方法。重点是通过重复BLAG循环沉积在机械稳定，周期性波纹状氮化硼层上的Co簇。该方法结合了表面支持簇的成熟制备方法的优点；也就是说，从气相沉积簇的多功能性和模板表面上定向生长的定位精度。通过扫描隧道显微实验得到了颗粒的覆盖范围和几何形状，并用解析模型和蒙特卡罗模拟对其进行了分析。该模型表明，粒子间相互作用严重减缓了完全覆盖的速度，导致一些簇的合并和生长。该方法代表了一种通用的方法来制造几乎任何金属的有序层簇。
The synthesis of highly ordered monolayers of metallic nanoclusters by a buffer-layer assisted growth BLAG route is introduced and investigated. The focus is on clusters of Co deposited onto mechanically stable, periodically corrugated boron-nitride layers by repeated BLAG cycles. The approach combines the advantages of well-established preparation methods for surface-supported clusters; namely, the versatility of cluster deposition from the gas phase and the positional accuracy of the directed growth on template surfaces. The particle coverage and geometry are obtained from scanning tunneling microscopy experiments, and analyzed with analytic models and by Monte Carlo simulations. The model shows that the approach to full coverage is critically slowed down by attractive interparticle interaction, which results in the coalescence and growth of some of the clusters. The method represents a generic approach to fabricate ordered layers of clusters of virtually any metal.