2001 Fiscal Year Final Research Report Summary
Electronic states of metal nanoparticles investigated by far infrared spectroscopy
| Project/Area Number |
11640312
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
固体物性Ⅰ(光物性・半導体・誘電体)
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| Research Institution | Japan Advanced Institute of Science and Technology |
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Principal Investigator |
IWASA Yoshihiro Japan Advanced Institute of Science and Technology (JAIST) School of Materials Science, Associate Professor, 材料科学研究科, 助教授 (20184864)
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| Co-Investigator(Kenkyū-buntansha) |
TERANISHI Toshiharu Japan Advanced Institute of Science and Technology (JAIST) School of Materials Science, Research Associate, 材料科学研究科, 助手 (50262598)
MIYAKE Mikio Japan Advanced Institute of Science and Technology (JAIST) School of Materials Science, Professor, 材料科学研究科, 教授 (80112019)
MITANI Tadaoki Japan Advanced Institute of Science and Technology (JAIST) School of Materials Science, Professor, 材料科学研究科, 教授 (50010939)
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| Project Period (FY) |
1999 – 2000
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| Keywords | metal nanoparticles / organic ligands / 2D superlattice / far infrared spectroscopy |
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| Research Abstract |
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,
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