Electronic states of metal nanoparticles investigated by far infrared spectroscopy

远红外光谱研究金属纳米粒子的电子态

• 批准号: 11640312
• 负责人: IWASA Yoshihiro
• 金额: $ 2.11万
• 依托单位: Japan Advanced Institute of Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11640312/
• 关键词: metal nanoparticles; organic ligands; 2D superlattice; far infrared spectroscopy; Pt超微粒子; Au超微粒子; ポリ(N-ビニル-2-ピロリドン); ポリアクリロニトリル; ドデカンチオール; 粒径制御; 遠赤外分光法; 電子状態; 有機配位子

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,

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。对于稳定金属纳米粒子的有机配体，我们使用PAA或PVP作为PT和Pd的配体，而DT用于金体系。特别是，我们已经成功地制造了二维单层金纳米颗粒，形成六边形晶格。此外，利用Fe^2离子的配体间桥接，成功构建了二维超晶格和三维聚集体。我们还获得了关于磁性和光谱性质的重要信息。我们在远红外光谱中发现了几个系列的吸收峰，这些吸收峰不属于有机配体的吸收。这些峰极有可能归因于纳米粒子中量子化电子能级之间的跃迁。基于伍兹-撒克逊电位的定量分析正在进行中，

项目成果

T.Takenobu et al.: "Antiferromagnetism and phase diagram in ammoniated alkali fulleride salts"Physical Review Letters. 85. 381-384 (2000)

T.Takenobu 等人：“氨化碱金属富勒烯盐中的反铁磁性和相图”物理评论快报。

T.Teranishi et al.: "Metallic Colloids In Encyclopedia of Surface and Colloid Science"Mercel Dekker (in press). (2001)

T.Teranishi 等人：“表面和胶体科学百科全书中的金属胶体”Mercel Dekker（正在出版）。

C.M.Brown et al.: "Structural and electronic properties of the non cubic・・・・"Phys.Rev.Lett.. 83. 2258-2261 (1999)

C.M.Brown 等人：“非立方体的结构和电子特性…”Phys.Rev.Lett.. 83. 2258-2261 (1999)

T.Ozaki et al.: "Stiffness of single-walled carbon nanotubes under large strain"Phys.Rev.Lett.. 84. 1712-1715 (2000)

T.Ozaki 等：“大应变下单壁碳纳米管的刚度”Phys.Rev.Lett.. 84. 1712-1715 (2000)

T.Teranishi et al.: "Self-Organization of Au Nanoparticles protected by 2,6-bis( 1'-(8-thiooctyl) benzimidazol-2-yl) pyridine"Journal of American Chemical Society. 122. 4237-4238 (2000)

T.Teranishi 等人：“2,6-双(1-(8-硫代辛基)苯并咪唑-2-基)吡啶保护的金纳米粒子的自组织”美国化学会杂志。