Electronic states of metal nanoparticles investigated by far infrared spectroscopy

该项目最重要的成果是成功合成了单分散的铂、钯和金纳米颗粒。对于稳定金属纳米颗粒的有机层，我们使用PAA或PVP来稳定PT和Pd，而DT则适用于金体系。特别是，我们成功地制备了形成六方晶格的金纳米颗粒的二维单层。此外，利用Fe^2离子的配体间桥联作用，成功地构建了二维超晶格和三维聚集体。我们还获得了重要的信息，磁性和光谱特性。在远红外光谱中，我们发现了几个系列的吸收峰，这些吸收峰不是有机配体的吸收峰。这些峰最有可能归因于纳米颗粒中量子化电子能级之间的跃迁。基于伍兹-撒克逊潜力的定量分析正在进行中，

The most important result of this project is the successful synthesis of monodispersed nanoparticles of platinum, palladium, and gold. For organic lgands which stabilizes metal nanoparticles, we used PAA or PVP for PT and Pd, while DT was useful for gold systems.Particularly, we have succeeded in fabricating two-dimensional monolayers of gold nanoparticles forming a hexagonal lattice. Furthermore, two-dimensional superlattice and three-dimensional aggregates were successfully constructed with use of interligand bridging by Fe^2 ions. We have also obtained important information on magnetic and spectroscopic properties. We found several series of absorption peaks in the far infrared spectra, which are not assigned to the absorption of Organic ligands. These peaks are most likely attributed to the transitions between quantized electronic levels in nanoparticles. A quantitative analysis based on the Woods-Saxon potential is underway,