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,

该项目的最重要结果是成功合成了铂，钯和黄金的单分散纳米颗粒。对于稳定金属纳米颗粒的有机LGAND，我们将PAA或PVP用于PT和PD，而DT对黄金系统很有用。尤其是，我们成功地制造了形成六边形的金纳米颗粒的二维单层，形成了六边形晶格。此外，通过使用fe^2离子的间缘桥接成功地构建了二维超晶格和三维聚集体。我们还获得了有关磁和光谱特性的重要信息。我们在远红外光谱中发现了几个系列的吸收峰，这些峰未分配给有机配体的吸收。这些峰很可能归因于纳米颗粒中量化电子水平之间的过渡。基于木材 - 撒克逊电位的定量分析正在进行中，

项目成果

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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）。

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)

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.Teranishi et al.: "Self-organization of Au nanoparticles protected by・・・・"J.Am.Chem.Soc.. (印刷中).

T. Teranishi 等人：“受……保护的金纳米粒子的自组织”J. Am. Soc.（正在出版）。