2019 Fiscal Year Final Research Report
Fine Structure of Bimetallic Solid Solution Nanoparticles Dispersed in Liquid by Double-Head Matrix Sputtering
| Project/Area Number |
17K14072
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Nanostructural chemistry
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Keywords | solid-solution alloy / alloy nanoparticles / co-sputtering / polyethylene glycol / sputtering onto liquid / particle growth / immiscible / intermetallics |
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| Outline of Final Research Achievements |
The research aims at the synthesis of bi-metallic solid solution nanoparticles by sputtering onto low-volatile liquid or directly on solid substrate and study of their fine structures. We obtained solid-solution alloy nanoparticles of controllable composition and sizes for various metal pairs such as solid-solution (Au/Ag), intermetallics (Au/Cu, Pt/Cu, Pd/Cu) or immiscible (Pt/Au) in the bulk. The solid-solution structure was confirmed with the atom resolution images coupled elemental distribution in combination with XPS, XRD, and UV-Vis results. The size-composition correlation was observed for alloy nanoparticles such as Pt/Au. Particle growth was evident on the gas-liquid interface, in the bulk liquid, and during storage.
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| Free Research Field |
materials science and engineering
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| Academic Significance and Societal Importance of the Research Achievements |
この方法により、さまざまな酸化還元電位や粒子形成・成長の基本的な理解に留まらず、さまざまな金属ペアの固溶体合金ナノ粒子の制御可能で再現可能な合成が可能にする。そのため、従来の合成では困難だったマルチメタル固溶体合金の合成への応用が期待さレル。小粒径（<5 nm）で組成を調整可能な固溶体合金ナノ粒子は、粒子の特性を調整するための有用なツールであり、新しい特性を持つ触媒などの用途に期待される。
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